From what I can see, all the D30 derived back protectors are the same size and spec, so this RST represents very good value, compared to the (identical) offerings from other companies like Held and Furygan etc, which are much more expensive.
However, it's worth remembering that like all Level 2 back protectors, this RST is nearly 2cm thick, ie twice as thick as (say) a Richa Level 1 back protector. That's a lot of extra bulk, particularly if your jacket is already tight and / you intend to also fit chest protectors. I didn't like the extra bulk, so I ended up fitting this RST inside my Kriega rucksack and putting a L1 Richa Level 1 in my jacket.
As I said, it's not a fault - all L2 back protectors are the same thickness, which won't suit everyone.