I bought this for use with a standard trolley bag and a Powakaddy manual trolley. It is a sturdy, fully waterproof cover. It covers my golf bag and clubs and although it is a bit fiddly to put on, if I do it at the start of the round then it is not too bad. If I'm out on the course when the rain starts, I tend not to bother with it because I find it too much of a faff to fit.
What I really dislike about this cover is that there is no zip or other means of easy access to your clubs as you go round. You have to either ferret blindly about under the elasticated top section to select a club by feel, or peel back the whole top section, exposing all of your clubs to the rain. You then either have to leave them exposed while you play your shot, or stretch the cover back over them, play your shot, then uncover and recover them again before you move on.
It never occurred to me when I bought it that a product from Powakaddy, who make such excellent trolleys, would be so poorly designed.