"The Lego Mindstorms EV3 is an awesome piece of lego construction. Mine has been configured in the TRACK3R and SPIK3R modes, and both of them are an absolute joy to use. As SPIK3R, the Mindstorm had some issues navigating non-solid surfaces (eg carpeted floors) , but made up for this by having an incredibly accurate launcher attached to the tail and excellent movement in the leg sections. The TRACK3R's capacity to easily construct new contraptions to use is very well appreciated too, and the versatility this provides sources excellent entertainment. Alongside these, the Control Brick is amazing to use. The only downside is the rate at which it consumes batteries, as prolonged use often leads to the product requiring a whole new set of batteries. The IR remote provided with the product is quite hard to get used to, but once you get over that it is quite amazing to see just how much LEGO have put into this product. The only downsides to this product are that it can be quite hard to get the cabling to fit perfectly, which can be a source of annoyance, and the companion software is quite slow to run on my PC (but that is probably just my PC). Overall, a great product that I would recommend to any LEGO fan!"