I really should set a direct debit from my salary to Boots, I find it impossible not to spend a fortune in there!
One of the reasons Boots does so well is that you can depend on it, their stores are clearly laid out, their staff on the whole v knowledgable, well stocked, stores are clean and well lit, pricing clear and decent offers. Their loyalty scheme is great esp their Parents club. I've just stocked up on essentials in their 3 for 2 baby event and made some great savings.
We have a Superdrug about 2 mins from our office. It looks run down, tatty, some of the stock looks old, cheap and the staff are not uniformed but look as if they've just rolled out of bed. It doesn't appeal to me in the slightest. I'd rather walk further to Boots and feel I'm in capable hands.
Granted, this just might be my local Superdrug, but on that basis alone, I'll never shop there unless Boots was out of stock of a particular item I was really desperate for, (but that's highly unlikely.)