So here's my impression of the Toxic Shiznit vs. the Haveston.
For those that do not own the Haveston, it is pretty thick, but as you can see in my previous post photos my meaty wrist makes it disappear. If you have a bony wrist it might sit a tad high depending on the watch. The Dornbluth caseback is also as flat as a board so take that for what it's worth.
I must say, too, that the Haveston sits differently in that the keepers ride on the underside of your wrist next to the buckle as opposed to the side of your wrist, which I've grown accustomed to in appearance and prefer. So the only way to really label the Haveston is "british-style -or- Haveston-style" Nato for lack of better term.
There should be just enough length on the tag end of the Haveston to prefold it and work it under the the first keeper because it's NOT secured by stitch and free-floats... You simply fold over and walk it back over, but only if you have a <7" wrist. It's a bit tricky to fold back into the last keepers once it's passed through both keepers.
I bought two of each and am happy with my purchase because I like to stockpile cool straps for the unflippable custom Dornbluth, but the Toxic wins.