i've got the vrs terra guard modern (green) and i love it. in my opinion, it looks great and is slightly less bulky than the original terra guard and the spigen tough armour (both of which i also have). it gets a little dirty over time and, weirdly... i like the look when it does, but can be cleaned to 'new looking' with some soapy water or some other cleaner - i use methylated sprits. it's made of hard-ish (on the outside) and soft (on the inside) material, providing adequate grip. hinge protection is complete and i really don't think it (plastic) will scratch the (metal) hinge - though i also have the spigen lens protector which came with hinge strips. the hinge protector itself functions as a ridge for me to hold the phone more securely with my index finger, when open flat. it comes in a few colours too, and the cost isn't bad either.

i have both the vrs design terra guard and the terra guard modern. bulkier, but complete hinge protection ('modern' is slimmer/sleeker) and coupled with spigen camera lens protector. definitely worth it, if you're ok with the added size. i also have the spigen tough armour. all good.