Were very helpful with advising on a blowback action pistol for a film project I'm working on at the moment, which got me into airsoft just recently. I do notice the prices are rather high compared to other places, but on the other hand, I've also heard, and experienced, good things about them in terms of aftersale support, so I suppose you get what you pay for.
I think they do have a branding issue perhaps - they appear to have been called "Combat UK" previously, and the physical store still holds that name, but I think they may have found it tough to compete online SEO-wise with the "Kombat UK" brand, and in response have switched to "Only Airsoft". As a result, things can be a little confusing.