Great prices and great range.
(Recommended)
Pros
Argos went through a phase years ago where it always seemed to be expensive when compared with its competitors. Then all that changed and prices came down to make them a major challenger to even any internet sellers.
This is one of the Superstores of the chain, and hence has the larger catalogue and greater range of products. The ideology behind Argos is a growing imitative that seems to fill that gap between purchasing something in a store on the high street immediately, and ordering it off the net and waiting for a few days for it to be delivered.
By that I mean you can browse the catalogue in your own time in your own home (as you would with the internet), make sure what you are after is what you want (eg sizing, colour etc as you would with net purchases) and then go to the store to purchase it immediately. All that with a 14 day returns policy.
Cons
Nothing of note.