Absolute pain in the bum to get off, but other than that they are awesome, feel very protective without limiting movement, survived well in very heavy rain, didnt feel any water getting through. Ive walked around in them for a couple of hours and they been very comfortable. They have enough space for my leathers to be tucked in without being intrusive. They really have got it spot on with the ankle movement, doesnt feel restricted at all, yet feels protected.
My friends has just bought a pair of the Oxtars, (He paid £38 delivered from ebay brand new) they remind me of my old Sidis. I do feel technology has come a long way since then though, They are great value for money, but the basic models havent quite copied the vertibra system right, my old sidis had limited forward and backwards movement the Oxtars look very similar, but they dont have the sliding pieces of plastic limiting the movement (if you have a pair of sidi vertibras ull knwo what I mean), not sure how well they would fair in a crash.
If you are buying your boots for commuting, dont buy the pumas, its a 2 person affair getting them off and could be rather embarassing in the office. I would highly recommend them for weekend blasts though.
The vertigo corsas look like the best of both worlds, as they have a zip down the side so must be pretty easy to put on and take off.