i'm no expert at all… they feel great, and i've had no real issues with bottoming out. i guess they're pretty linear though. when they've got a bit soft i pump them up… the absolute daming lockouty thing is ok, but past 2 clicks there is little change in effect – fully open has no platform, one click has enough to cancel out most low frequency bob, and 2 clicks is as good as locked out tbh – the 3 others add little if anything. i think this is a known 'problem', although i've never seen it as a problem. similarly the clicking on rebound is another know thing (certainly with 08/09 forks), again only a problem if it really annoys you. lots and lots of info on mtbr about tuning them afaik. i've never bothered.
so yeah, i'd say they are pretty linear compared to the revelation 426s and Z1 FRs i have been using before.
within their class though, they are really light forks. got the 26" ones to drop a bit of weight from my solitude, and they've done a good job of that.
biggest issue with them is the 20mm bolt-thru – which really is bolted on – no QR system. my 29er ones are QR, which are fine, although i would almost be tempted to get the 20mm version for the 120mm 29er forks, as they are a litle flexy compared to the competition i reckon