No, it's not that good. Fair enough, it's fairly good quality, but it's still ridiculously overpriced for what you get. A plain hoodie with the (frankly ugly) logo on it is £50, a t-shirt - £30. That's a lot for a plain hoodie or t-shirt. The coats start getting into the £150 - £200 mark and for what, a boring coat with the logo emblazoned on it 4 or 5 times? It's ridiculous. The lumberjack/flannel shirts are nice and the jeans are alright... (still overpriced though) but the shop really doesn't offer a lot more than what is shamefully just a statement of wealth. The clothes aren't particularly interesting in design.
I know exactly what you mean because I've seen it first hand. I must have seen, what, 20 people at my school with the plain hoodies (be them in different colours), countless t-shirts, about 10 - 15 guys have the Superdry bags, and I kid you not there are at least 5 people with the exact same coat. There are a group of guys who only wear Superdry stuff.
It really is ridiculous, at least where I'm from.