Every pc I've built from age 8 (my first with help from dad) right the way through to my mid 20s has been bought from scan, and I wouldn't keep purchasing from them without it always being a fantastic customer experience, way before amazon did it.
Staff are always very helpful and have even saved me money at the checkout by suggesting alternative components that are in their 'today only section'. When I've had problems with components (which has been very rare) the problem has always been resolved quickly.
Also worth popping into store if you're even remotely local to their Bolton middlebrook, it's like Disney land for tech fans. Lots to play with, and some serious kit on display, which alwats seems to change.
Thought it was worth a review due to how long I've been a happy customer.
Cheers