In reply to Goucho:
Would like to ask you when you last used one, but you've already said your experience is based on having borrowed one once. Maybe you should have another go, we can't all be making it up.
To the OP: Getting the right paramo is another thing, I have an aspira smock and a Quito jacket, the former I use for winter climbing as it's too warm, the latter for everything else, it's weakness is durability in winter climbing, when everything would suffer except the aspira. Paramo have released new models since I bought the Quito, so would suggest a long search to find the one that best suits your needs.