The guys at Car Audio Centre (Illford) were amazing - I ordered an underseat subwoofer off the online store (on sale) then took it into the store and they installed it for a great price, absolutely perfect job, and they were very accommodating with fitting me in on the day. But more than anything, they were just wonderful guys who were a joy to deal with. The In Phase USW300 is a fantastic choice for a small car too (Ford Fiesta) - I've not tried the Kenwood competitor (which was my original plan) but knowing what I do about audio equipment (and reading reviews of the Kenwood dying, presumably from pushing the smaller amp too hard), I'm very glad I upgraded. The USW300 is plenty, but I also wouldn't want much less. Overall a great experience, and highly recommended in all ways.