with jade I just used Boots own brand bottles & found them fine, teats needed replacing often but i think because i was using steam electric steriliser it ruined the teats!
With Jessie I used a combination of Boots own make & Avent bottles. I bought an Avent steam microwave steriliser which came with bottles in it.
Got on ok with them aswell, although I think the slim ones are better than the wide neck as I had probs with teats getting squished when she was drinking the milk, seems to happen more with the wide neck bottles.
this time I've got Avent bottles that I bought from Ebay. Someone on another site did a swap with me for some Heinz angled bottles which i've never tried before, plus I have some non-brand bottles that I got from kiddicare.