Soft cab closure for Hisun Sector 500

[karaRobert]

I’m considering a soft cab closure for my Hisun Sector 500 — specifically looking at the Hisun 500 soft cab enclosure upper doors option. Supposedly it gives basic protection from wind and rain, but I’m skeptical how “soft” plastic and fabric will hold up on rough trails. Will those upper doors flap, leak, or get fogged up on cold mornings? And how about zip-up closures — are they worth the trouble, or just weak and cheap-feeling?
If you’ve run soft-cab doors on a Hisun 500: what worked, what didn’t, and would you buy them again or skip hard doors instead?