I took the plunge on a RAM mount yesterday. The whole lot is fiercely expensive. £90 all in; luckily I had a £30 voucher which took the sting out somewhat.
These are the three bits I bought (the actual phone mount, a short connecting arm, and the bit which actually bolts to the bike:
The mounting kit allows you to fit the mounting ball either to the bar via a ‘U’ bolt, or what I opted for which is the ball mounting onto the front brake mount. This option makes it nice and clean looking when you don’t want your phone mounted as you can remove the whole thing bar the ball. It comes with 2 lengths of bolts, in my configuration the shorter one was too short and the longer one too long. I ended up using the longer bolt with a nut in place to space it out. Not ideal, I shall probably Dremel down the bolts to make it look cleaner. However, it’s secure which is the main thing, remember these bolts hold your front brake onto the handlebar!
The kit does come with that flappy bit or rubber too, I left it off but now I know how it mounts I’ll definitely use it!
I’ve not used the kit on the road yet.