What a coincidence. I had a sponsored ad from them delivered to me today. I like their bags and do think they're nice BUT - they are not unique to their online store. In fact, they are relatively common (although I can't think of any of the online stores that I've seen recently that carry them right now). The bags are good quality, but are more expensive from Pom Pom London. BUT - their bags come with 2 fabric straps included in that price so I do think it is a good deal, provided that you want those straps and extras.
I purchased a few of these bags and straps last year from an independent online boutique called Stripygiraffe (https://www.instagram.com/p/CDlUTIPFdtJ/) but she is no longer operating her online store. I also purchased one of the bags from an independent boutique on my high street. The Pom Pom bags are lovely, but are available in other independent stores cheaper. Pom Pom is selling the straps for £18.95 each, and I know I bought two of the exact same ones they're selling from Stripy Giraffe for £12.95 each.
I would suspect that the bags are all manufactured in the same place, but each independent boutique owner has the ability to customise them slightly with their own logo, name, etc. All the bags I've come across and purchased are made in Italy out of high quality leather. I have also seen very slight variations on these bags each season. Some have a side zip, some do not. But in the end they are all so so similar.
This bag below for example looks identical to the Pom Pom bag (Pom Pom does have a nice lining in their bag with their brand name in it, and I can't say what the other bag is like inside as I've not seen it in person, but i know they were about half the price.
Saying all that, I was thinking about getting one from Pom Pom, in a different design to the one I got from Stripy, but in the same colour. I wouldn't need or necessarily want both straps though. I'd prefer just to purchase the bag on its own for less.