I had them 7weeks ago with Mr Adamo at holborn clinic [he specialises in this type of implant]
was not painful first day due to drugs lol but if you rest for a good week its more of a tight heavy feeling rather than pain- I can’t keep still though and had to work on my project [cad/3d] so probably over exerted myself but if you take the painkillers every 4 hours you will be fine.
mine properly settled at the 5.5week mark [need to upload some more pictures] and look so much better were so high for a while lol but loved them at the time as had nothing pre op.
I personally could not have more than 255 due to my size and lack of breast tissue but glad I didn’t push for any bigger as they look great and have lots o choice with sexy underwear in my size and also can still go bra-less with backless dresses 
the slope has finally shown itself once swelling has gone down and don’t look fake at all!! success in my mind.
at wk 7 they feel more natural but I won’t lie takes a while on some people- as no previous tissue obviously feel less natural at mo as nothing to cover them.
Mr Adamo said at the 6 month stage thats when you won’t realise they are not your own.
hope that helps feel free to pm me xx