Jon I have the brolly(alloy poles) with overwrap.I think this is excellent and versatile.It is as close to condensation when the two are used together as I think you can get using nylon.In summer just use the brolly , later in the year or in rain use the two. It goes up quickly , goes down in a flash with a bit of practice and nothing has broken bent or leaked in two solid seasons.It is light and flexable enough to get into tight or uneven swims.It has stood up to some of the worst hoolies the Fens can come up with.
On the down side is the price , the fact it has no where to hang anything inside and the pegs it comes with are (were) crap but that is par for the course.
It is the best I have used and that is saying something considering my last was a original Nashy Profile (repeat original as the current crop are useless).