I just purchsed 2 of these from Lowe's to replace some terrible Gerber's that were clogging just about every day. The new Champion 4 design seems to work very well and I couldn't be more pleased, but it's only been two weeks. The plunger has been moved to the garage storage room.
As far as the install, I didn't think it was bad at all. I have installed maybe 4 or 5 toilets before, and I didn't think these were any more difficult than normal. Took about an hour to remove and replace each one. If you don't own a socket set, you should probably question if you should be replacing your own toilet anyway. I can't imagine that a good plumber would have difficulty with these.
As far as looks, it is way better than the Toto Drakes I had installed in my previous home. They were too small in my opinion and looked like something you might install in a child's bathroom. The tank looked so dinky against the wall and set away from the wall about 3-4 inches. This basically negated any advantage you might think you get with a smaller footprint because the edge of the bowl was still about the same distance from the wall as a "normal" size toilet like the Champion 4. The Champion 4 has a nice, full size tank that fits right up next to the wall with a 12" rough-in.
Because I have owned both, I can also say that they flush of the Champion 4 is superior to that of the Drake. Don't get me wrong, the Drake was excellent, this one is just better. It's like the bottom just drops out of the toilet and everything is gone. Seems to have excellent bowl wash as well.
Maintenance will be the determining factor and only time will tell on that. If I just have to replace a couple of seals every 2-3 years like i would have to replace the flapper on the Drake, I will be very happy with my purchase. Oh, and did I mention that the Champion 4 is about $100 cheaper than the Drake and has a 10 year warranty?
I just thought someone might be looking for an updated opinion on these new toilets since a lot of the same people seem to be bashing the old design that was obviously flawed.