Sergio's is a hidden gem on Frogmore street (just underneath the Banksy mural on park street). I have been on several occasions both on their a la carte menu and the very reasonably priced lunch menu. The food is always amazing with very fresh Italian flavors. It has a wonderfully quaint family feel with chalk board menus and permanently lit candles on the tables. One cant help but think that it is Italian food as it should be; fresh flavors and superb ingredients, cooked simply but with style.
If i have any criticism it is some of the servers lack of English which sometimes makes ordering a bit of a chore. However the servers are very pleasant and my strong Mancunian accent probably doesn't help people for whom English is not a first language.
Whilst they do allow customers to 'bring their own bottle'(champagne and wine only) I instead usually opt for there house wine which is lovely. I also enjoy the option of a carafe this old school touch was really helpful as I did not fancy a whole bottle but wanted more than a glass (as i dine with a partner who resolutely hates my favorite tipple of white wine.)
All in all, language barriers aside, I have never had a bad experience at Sergio's and it will always remain as one of the best Italian Restaurants in Bristol.
Happy Dining,
Wino