It took me a bit to find this place, and I first got lost at the inferior Levi's store just north of Oxford Circus, but once I found it I was well taken care of. I prefer Levi's due to my affinity for all things San Francisco, and it was a real test of my brand loyalty in putting up with a long walk around Oxford Street and Regent Street to find it, but it was worth my while in the end.
I wear an unusual size of jeans, but I was met with very helpful staff members who assisted me in selecting different styles that fit and even gave me advice when I modeled them as to what looked good or needed adjustment (ahem). They have a wide selection, and even when they had to go into the back room to find my size, nobody was whinging or complaining. Great music as well, which made for a nice shopping atmosphere.
The only complaint I could come up with is that prices are a lot higher here than in California, but I've been learning in my time here in the UK to try and not make a fuss about exchange rates. Nevertheless, the jeans I bought, which were I think among the cheapest in the store, came in at £50, which isn't exactly dirt cheap - and they ranged up close to £100 which is far from cheap (I bought my last pair of Levi's 511's for $40).