JTS 4040 rain suit, £45.99
Miles covered/time: 1000 miles/one week in Scotland (heavy rain every day)
What's good:I'm 6'6" so finding a one-piece that won't ride up my legs is rather difficult. I found this 9XL suit in a sale for £15. Although, embarassingly, it's way too big for me around the waist, chest and arms, it's worth every penny. I tested it around Scotland, where it, of course, rained heavily every day and I stayed bone dry. Even a long heavy downpour on the motorway failed to penetrate it.
What's not: It is too big for me. But that's hardly the suit's fault. It takes a while to put on and if you rush it and don't take time to fasten the Velcro properly some rain will leak through.