Have 3 of the original design in active use the first one an early model had the original gasket design that was prone to air leakage which they replaced at no cost, no questions with the redesigned one. Since then I haven't had any issues with any of them and they must be 6+ years old now... One key maintenance change I would recommend to anyone is to clean and lube the stanchion of the post only DO NOT remove the collar every time you do this its simply not necessary. Faster, simpler and may put less wear and tear on the gasket since I have not had a leaking post in years and they just keep working well. The posts are super smooth, simple and cheap to service when needed and reliable.
By contrast a OneUp post arrived with a crap ton of wobble in the head like old school dropper wobble... For another bike that required an external cable I picked up a PNW post and that thing is so clunky and loud in operation its almost embarrassing to use in public. The KS on my sons bike simply stops working if the seat post clamp is at a tightness level required to keep up an adult sized human (thankfully he's not yet). Finally $300 to service a Reverb?