This set doesn't have a good review on Brickset right now, so here is a (hopefully) more helpful review of 9748: Droid Developer Kit!

• Box / Instructions: The box is kind of a thin cardboard that holds a firm inner box. Inside is a plastic sorting tray, which is very helpful rather than having the pieces in a big pile. The Constructopedia (instructions) come both in physical form which tells you how to build a Trainer droid, R2D2, and a Jedi Knight droid. We will get to those later. Also included is a CD with building challenges and digital building instructions for the same models in the Constructopedia. Because the software is not quite optimized for newer PC's, it is not too important unless you want to make some of the exclusive models only on the CD. Have I gone on too long with the instructions?
• Parts: The kit comes with plenty of cool parts, including a pair of specialized R2D2 panels. It also has a lot of other neat beams and liftarms for the time. Where else are you going to get 20+ white studded beams? Yet again why would you need them nowadays... Anyways, the star of the parts list is the Microscout, the brain. It has a light sensor and a motor built in so anyone can try building a droid. And better yet, if you don't know how to program (or don't want to), 9 programs are built in! They all demonstrate what the Microscout can do. For anyone wondering, the P program was a program meant for set 9739, which was never released. There's more about it on the internet.
• Build: Building the models is fun, sometimes a little tedious. Nothing too difficult. You know what is difficult? Getting the CD to work! With a Quicktime update it's fine (at least on XP), but I thought i'd mention it.
• Completed models: I won't go too deep into the models (this review is long enough!), but i'll summarize what they do.
• L3GO: Rolls around with a simple dive gear system and has a turning arc when going backwards. Has poseable arms and neck.
• R2D2: Rolls around with a semi-complex drive gear system and has a turning arc when going backwards.
• Jedi Trainer Droid: Rolls with a complex drive gear system. Has a gripper in the front that has a gear and flex-cable system.

Final Thoughts: It was a great idea for LEGO to use their new Star Wars license with the robot, or droid building of Mindstorms. And it was also a good way to introduce younger builders to LEGO Mindstorms. Though for older builders, it's best as an expansion for the Robotics Invention System. Getting it now isn't necessary, but for younger builders who want to build robots and likes Star Wars, it's perfect.

This is an exellent set however I do not like the fact that the instructions are on a CD the programs are also great exepy for the P program, what does this do also great artwork on the box anyone know were I can get a set of paper instructions

I picked up this set second-hand for about 30 dollars just out of pure curiosity.

Parts

This set came with a fair number of rare parts, including the printed R2-D2 panels, blue and white 'wing' parts, and appears to be the only set to include the white 64mm corrugated pipe piece. (Check out the BrickLink entry here)

It was also one of the few sets to include teal 2M Fric. Snap W/Cross Hole pins.

The Micro Scout Controller, whilst advanced for its time, seems dated today, with only one built-in light sensor and one motor.

Models

L3GO

Being the first model in the instruction manual it is also the simplest. It either moves in a turning arc or in 'straight' line. In reality, it veers ever so slightly towards the right, given that the entire model is essentially driven by the left wheel.

There is also an over reliance on rubber bands to provide friction for the arms, as the past two decades haven't been kind to said rubber bands. Without rubber bands providing the needed tension, the arms would just remain limp by the sides.

The finished model is much less scary than that depicted in the instruction booklet however, perhaps due to the lighting.

R2-D2

There were two versions of R2-D2s that you could build, however the one shown above is the one without official instructions. When constructed, a wheel contraption spins around within R2-D2's head, driven by simple gearing powered by the controller's motor. The second play feature, if one manages to get it to work, shoots out an arm. However, that feature seems to rely on rubber bands too, so it's prone to malfunction.

The main R2-D2 model has similar functions to L3GO above.

Battle Droid on STAP

This was probably the hardest model to put together given that there weren't any official instructions. The original base also featured some... questionable building techniques hence the base shown above is slightly different.

However, this is arguably the most interesting model, given that you have to try to knock the battle droid off the STAP and that the build itself looks relatively clean, unlike the alternate R2-D2 model which just looks... bad.

Verdict

Despite all its flaws, in terms of playability, it probably beats most of the 2022 lineup so far. The fact that you're encouraged to try and work out alternate models yourself, is something that is somewhat lacking in modern LEGO sets. I've spent hours on this set, yet I've only built four of the eight models suggested on the back of the box.

Is it a flawed set? Certainly. Does it have questionable building techniques? Sure.

Will I dismantle it tomorrow and attempt another model? Absolutely.

Further reading

Here's a list of the resources for those who would like some instructions, though they may not be entirely accurate.

[Lego 9748-1] Droid Developer Kit: Alternate R2D2 Droid Guide

Instructions for Battle Droid on STAP from the Droid Developer Kit (9748)

Note: The instructions seem to use parts not included in the set, however it is at least 90% accurate. Check out the original video here

And here's a video review by Nonsense Wars.

LEGO Mindstorms 9748 Droid Developer Kit Review + DSDK/RCX Extensions

This was a really good idea from Lego but however, it wasn't that great. First, the instructions are on a CD which is not cool. I like the idea of making R2-D2 which is excellent in Lego's part. This is good, but not 5 status.