My advice is, spend a bit more and get some breathable ones, if you don't you'll find that as you sweat your clothes will still get wet from the condensation. And you'll start to smell. 
Just bought the £12.99 blue ones from screw fix i will see how i get on with them before i buy a better a waterproof suit.
I didn't want to spend £60-70 for a decent suit a find i keep getting it caught on fences and tawn

If the cheap one don't get tawn i will get some good one for winter

Out working tomorrow rain or shine

Paul