I’ve got a V8. It’s ok. You need to service it a lot in wet conditions (every 2 or 3 rides) but it really is a piece of piss to do, and only takes about 5-10 mins. It has a really narrow sweet spot in terms of cable tension, but when you get it right it works consistently.
It has developed a fair amount of play at the top as the bushings seem to wear quickly. I suspect I will be testing the UK two year warranty on this eventually.
Having said that this, it still doesn’t seem bad for the money. By the way, I’ve found that copper grease is the best viscosity for the moving parts on this post, not thick Teflon grease.