I have the Dainese trail skins, the first ones. The second ones look like they address my only grip with the originals in that they are more formed to the knee cap. They stay in place. have side protection, move well and aren't irritating, but the fit it a little awkward as they are not cupped enough to fit nicely on the knee. I would recommend them and figure the new ones are the way to go if you can find them. I live in the North so I pretty much have to buy online anyway since local options are extremely limited.
Light Flexible Knee Protection
Posted by: flowrider
Any love for the RF Indy's or the RF Ambush?
Similar experience to the above with the Indy. The stretchy fabric and seam started ripping badly within a few months. I warrantied them and Race Face let me use the credit toward a pair of Ambush. Still using that same pair of Ambush over 3 years later and love them. On/off with shoes on, beefy enough for bike park (although D3O/fabric doesn't slide as well as hard plastic) but comfortable enough to pedal in. For long fire road grinds I just put them around my ankles.