I got the thing from Amazon, and I didn't know that is was the fully assembled version.
Which disappointed me a bit. It might have been a blessing, the parts are very small pieces of plastic
which snap together, but you have to have small agile fingers - more typical of children than people my age.
The package also did not include the Bluetooth module.
You could control it through Bluetooth from a Android device (which I have done with MakeBlock robots).
However with the bluetooth module, the cover won't fit anymore.
They did include an extra motor, which is good.
I haven't tried to program it yet with the Arduino IDE. I'll try that first before moving to B4R.
I got diverted to another project that was time consuming. So this will have wait.
Another "minor" problem (not). My wife finds it creepy.
The head, especially with a sensor stuck in it is a bit creepy. The walking motions are OK.
One neat thing, it rights itself (even without extra programming).
Easy and worth buying are of course personal evaluations, it is not a lot of money, and if you can afford it, then why not.