I've owned snap on covers before & now have a Rankin. I will forever walk about from any boat deal if it has snaps on it. Over time the holes crack, snaps get pulled out, and just plain look like hell. I'm not a fan of having big clunky ratchets on the cover eiither. The wind will beat it to death on your boat if it's not absolutely tight.
The Rankin (or Evolution now days) doesn't use any of that hardware. It covers all the vents & glass on the boat, keeps the bugs out & windows clean. One draw string & 5 straps secure it good enough to tow it down the freeway. Cory & Evolution will make side or rear skirts for it if needed.
We leave the boat on the lake for weeks at a time. It really takes a lot of the work out of boat ownership. Clean it once a month, pick up the garbage & wipe down the interior daily, and enjoy your time on the water.