It weighs approx 300g more than a fox rp23.
Warranty and servicing can be done by tftuned, ive had mine (a non cs version) serviced once, it was turned around in 4 days, so pretty quick really.
You could get yourself into a right mess with it if you fiddled but didnt know what you are doing, but luckily the cane creek website has base settings for a wide range of bikes, so if yours in on there then your sorted. If not then I gather a quick email to cane creek will elicit some starting point settings to get you going.
I found the base tunes on the website to be pretty close to how I ended up by trialand error.