The clasp has a micro-adjustment function that allows the strap to be fine-tuned, although the basic strap length is more difficult to adjust, as it needs to be cut to roughly the correct length first. The micro-adjustment mechanism is simple to use. Press to unlock and move the strap to the proper attachment point inside the clasp. 
You can’t see the movement due to the closed case back, which is a bit of a shame, but you can tell it by the watch’s performance. The chronometer-certified movement performs well in daily use – I expect the watch’s rate to change slightly over time. Still, at least in the week, I wore it, it added precisely one second per day, which is an excellent performance by any standard. The broader use of this movement by Breitling (I can only assume they will deploy it elsewhere in the next year or two) will dramatically change the assessment of the value proposition of Breitling replica watches by potential buyers.
This version of the Breitling Superocean Héritage costs $4500 (the blue dial version with the mesh strap is not much more expensive at $4700). After using the brown dial version for a week, I feel that Breitling offers a lot with this version. Its aesthetic design speaks for itself (it is undoubtedly one of the more handsome of the new replica Rolex watches introduced this year). With a ceramic bezel, a well-designed strap, and a built-in B20 movement – which performed very well during the week I used it and has some attractive technical features – Breitling is a significant new contender in the $5,000 and under fake watch category. Definitely worth a serious look, and it gets a lot of what more expensive dive watches do for a lower price.