NATO-style straps in general: NATO straps are very comfortable and secure, and they're perfect for divers' watches because they can accommodate extra width (to accommodate a thick wet-suit), while the extra material folds neatly away when not needed.  NATOs are also perfect for military/field use (for which they were originally designed).

This brand:  the quality of this NATO strap is on par with Dievas straps you can order from Gnomon watches.  With international shipping, you'll pay approximately $25 for a Dievas strap, so this strap from Clockwork Synergy is a better value.  Both straps share the same weakness: the holes through which the buckle is routed fray easily, giving the straps about a 3-6 month life-span if worn every day (will vary depending on how much you wear it and how much fraying you're willing to experience before replacing it).  You can extend that life-span a little by using a match to cauterize the hole now and then.  I have found one company (The Strap Shop, UK, or TSS) that heat seals the holes really, really well and produces a NATO strap that lasts a whole lot longer.  TSS straps cost about $25 including shipping, and because they last so long, they're very much worth it.  However, unlike Clockwork Synergy and Dievas,  TSS does not offer a very wide variety of colors.

Bottom Line:  Lower quality than the best straps on the market, but the low price and the wide variety of colors may make these straps from Clockwork Synergy a good buy.