Nicely made, clever design, the "built in turn plate functionality" is brilliantly simple, makes measuring caster very easy. You really do not need turn plates. This is one of those tools that looks a whole lot like competing tools, but once you actually use it the differences become clear and it's worth the extra bucks.I didn't find the "hands-free" aspect to be necessary -- for any similar tool design it's only going to be helpful if you can actually adjust camber with the wheel on the car and the car on the ground -- but this tool is designed to be hand-held _or_ to attach, and it's so easy to use hand-held that there are no point off for this. Again this is a case of "once you use it you'll see...".If you want to be absolutely sure you're placing the tool in exactly the same place on the wheel each time, one small piece of blue tape to mark where the top pad should touch the rim and you're done. Mostly even this isn't important (I didn't understand this until I actually used the tool).Because of the design and the electronic gauge, the floor only needs to be reasonably flat (so it's not tweaking how the car sits), but not perfectly level.This tool is bulky, and although it looks like it might be collapsible, in reality it's not. So it's bulky to store. As with the 1100p toe plates I felt the need to spend 5 minutes with a deburring wheel, but that's mostly my OCD.If $$ or storage space are a concern (and you don't already have a set of toe plates), I'd consider the 3300p combination camber/caster/toe plates. They also have the "turn plate"/wheel angle feature, and based on using this tool and the 1100p toe plates I'd expect the 3300p to be very nearly as easy to use as this tool and (with some care) equally accurate. The big difference is that when measuring caster/camber with the 3300p you need to take care that you're holding the tool perpendicular to the wheel face as well as vertical or horizontal. With this tool's three contact points you're automatically aligned to the wheel face.