Bak Roll-X Cover

I have been trying to get some feedback on these covers, but haven't really been able to find any un-bias infomation so far. I interested in the Bak Roll-X cover. My main questions are; Does is leak, does it use the same kind of drain tubes as the other Bak covers, how much of the back window does it block when rolled up, what you paid for it, any complaints you might have with it, why go with the roll-x over the G2 or another tri-flip cover, can you still use the rail tie downs and is it worth it? If you are unfamilar with the Roll-X here is a link to the website http://www.bakflip.com/p-310-bak-ro...Bing&utm_medium=PPC&utm_campaign=Bak+Tonneaus