Love my X2's...
Lubing is not an issue...I lube my drivetrain once a week and at the same time I drop a couple drops of lube on the cleat...
Float is awesome, my knees like it. I find them very easy to setup and make slight adjustments to cleat placement.
The best part is getting in is so friggin easy! Every race I do I watch guys with Look style pedals fumbling trying to get going. I push off, put my foot on the pedal and click I'm in. No flippin the damn pedal to make sure I'm on the right side!
The only gripe is the walking in sand thing, but even that is not a real issue as long as you make sure you have the cleat covers...