I realize you already bought the cover but I second California Cover. You will be happy with it. The only other thing I would recommend that is extremely light and easy to bundle/store are good quality parachutes. They make great car covers if you can find old ones laying around. When I had over 8 classic cars a few years back I had a few old ones I found and they worked great. You can also just buy parachute material - I just happened to come across actual parachutes.
Currently I use both California Covers and parachute material.
As an alternative, I think our site sponsor offers other options for anyone else considering a car cover.