Disclosure - I work for The Warehouse
Noticed that the R2D2 App-enabled Droid is down to $100 at The Warehouse, RRP is $209.99 so not a bad deal...
Cheapest I've ever seen it so will now be joining my BB-8
Got one for Xmas - didnt pay RRP.
They are good fun. App has "missions" which is like Scratch (kids programming language). You can also build your own set of instructions via the scratch style building blocks.
Was hoping there would be some hacks out there by now but I havent found anything yet.