OK so i don't normally post negative reviews on products but my experience of dealing with specialized and there command post has left me no option but to warn others. I used to be a specialized retailer working in my local bike store. during this time i have sold a number of command posts and have seen an almost equal number being sent back to the UK supplier for specialized. i bought my post in late 2009 at the start of winter. did int really use it till the following spring when on the second ride i notice it wouldn't go into the lower position easily. managed with applied force to get it to lower only for it to return to full extension, beasting me in the balls when going over rough ground. the air pressure had all but go when i got home and reassessed what had gone wrong. the next ride the post wouldn't drop at all, half way round my trail center. i returned it to my place of work who sent it to specialized UK. they informed me that i must have been landing on it too hard and i had misused it so the 2 year warranty was invalidated! i had not be using it in this manner; having ridden only xc trails, and can only assume it broke when i was trying to get it to go down. in the end i had to pay £55 to them to get it fixed after riding it only twice and shelling out £250 for this. really unimpressed with specialized and wouldn't have ever thought i would say that being an ex-seller of there bike etc. Def would not recommend these. the post works now to an extent, but still leaks air and is temperamental when trying to get it to stay down. This is not an isolated case from other reviews i have read on the net and those posts i previously had returned on behalf of other customers. DON'T BUY THIS POST! get a gravity dropper instead or the new rock shox re-verb post.