Purchased a Dowco Guardian, full cover, 5 yr warranty. I used almost every day for the last 4 yrs. At 4 yrs and 11 months, it ripped up the middle when I was removing it. For $10, the replacement is on the way to me.
I like the product, dries fast ( important here on the wet coast), has a vent, 'heat proof' lowers, sewn in windshield pad, easy on and off, and never left a mark on the bike. Unlike the Nelson Rigg UV 2000, which I used twice and then spent 3 hours polishing out the silver residue that it left in the clear coat. But its big, bulky to carry around. Even in the pouch they include.
If you want a much lighter, smaller, half cover, I suggest you consider the Traveller - Size A - from EZ Touring. Well made, colors to choose from and is big enough to let you leave the top case on. (The Guardian will not fit properly with the top case on the bike.)
-Steve