I've had a Sneak skirt for 3 or 4 years. I have used it maybe 8 times, with my Tempest. Until learning to roll this past year (with neoprene skirts), I had not been much of a skirt user. Today, it was hot, and I decided to wear the Sneak, and give it a try with a roll. I put it on as I always had, with bungee as tied off at the factory. The skirt imploded immediately. I wound up taking about 9 inches out of the bungee (4 1/2 per side, on the knot). That allowed the skirt to hang on, on subsequent rolls.
It was not any harder to get the skirt on; the main difficulty in putting on a nylon skirt is always having to walk the bunched up nylon around the bungee and coaming. Maybe Seals expects users to tighten up the bungees. I should have been more rigorous with the fit, in any case. Of course, some water did pass the skirt, but, it's ok for minimal or unexpected rolling.
I like the main features of the Sneak: elastic suspenders, Velcro waist adjustment, outer zip pockets, and, most of all, the zipper that allows access to items under the skirt. The under-skirt-access zipper also allows the skirt to be donned easily -- hanging loose on the shoulders, by the suspenders -- then snapped, then zipped. The Velcro waist adjusters can be set once, then forgotten.
I was surprised today, to notice that, after such infrequent use, the backside coating on the nylon is crumbling away in several places. On one hand, I don't really expect a nylon skirt to be waterproof, anyway. But, would hope the coating would be more robust.