I've only had my lift on since 09March2013, so less than a month.
However, ride quality is excellent, then again whatever I replaced were shot to hell.
The top-out people are getting from going over speed bumps quickly are the coils expanding rapidly on the way down. Go slowly over and allow the front wheels to maintain contact with the entire speed bump. This should only happen during the first few weeks as it settles. Once it settles the 4" initial lift (this is how much it increased for me) will drop to the advertised 2" lift. So it should go away. Other than speed bumps, normal road imperfections are what you'd typically expect from stock.
The wear on the CVs are remedied with the installation of Manual Hubs.
SFD is what I dream of. Maybe one day. Until then, I'm looking at Sliders and Skid plates for now. I had such a difficult time compressing the coils to bolt the strut (they weren't kidding about the higher spring rate), I'll have to wait until the lift settles before adding the spacers up front.