Depends! Bont has used (maybe still does?) different sizing conventions for some reason... which model(s) are you looking at?

Here's my cycling shoe history w/Sidi, Bont and Speci:

* Sidi Mega 43 - eventually fatted out and was too wide
* Sidi 43 - started tight and became a great fit as it fatted out

* Bont A1 42.5 wide - way too wide and returned immediately
* Bont Vaypor 42.5 - fit like a proverbial glass slipper after heat molding the toe box out a bit and never fatted out
* Bont Vaypor S 43 - my current shoe which hasn't fatted out yet, but is a bit longer than the Vaypor 42.5 it replaced [Vaypor and Vaypor S use a different sizing convention and their web said move to 43 ... the Vaypor S 43 is a hair longer than a Vaypor 42.5 and a hair shorter than a Vaypor 43 if that makes any sense!]

* Speci 42.5 mtb - fits great and a lot like my current Vaypor S 42.5

Overall, I'm a BIG fan of Bont. I've read they're not for everyone's feet, but they've fit mine very well before and after heat molding. I've never had hot spots unlike my Sidi shoes occasionally. Plus my Bonts have been extremely durable in comparison to my Sidi shoes that only lasted ~2 seasons. Go for it! (And good luck)