The Good: They are comfortable, breath well and actually protect you
The Bad: Durability?
I have had knee pads in the past, that when you crash stick to the ground and burn you knee(because your knee slides in them) these have never done that. Also, as far as comfort goes they are the best I have ever tried on. Almost all my friends used to use 661 and now all havetransferred over to these, everyone is blown away at how well they work.