I finally got around to installing this cover a few weeks ago and I am very impressed with it so far. I got it from the guys over at truckalterations and couldn't be more happier with the whole crew over there. Great prices also, considerably cheaper than everywhere else I looked.
Now, on to the review. I haven't gotten to test how weathertight it is because I have not had it out in any rain since I put it on, but when I see how that works I will update my review. I also purchased the trailseal to further keep water from entering the bed.
Here are some pictures:
As you can see in the picture below, there are two supporting beams that go across that help to keep it up, however with the tension I have it set at now, you cannot tell they are there when the cover is closed.
Agricover states that it sets only a half inch above the siderails, and they are right. I love the low profile look on this thing!
The only thing that I somewhat don't like (and it doesn't bother me as much anymore) is that in the back, the cover sets about a half inch or so above the top of the tailgate. This would allow someone to stick their fingers or something else in and possibly pull the latch. I tried for a while and couldn't get it to budge so I trust the thing now. Also, I was able to unlock the slide latches through that hole, however unless you did your research, most people wouldn't realize they were there. There is a weather flap there that does a good job of keeping water out since it lays up against the inside of the tailgate. Besides, water would just trickle down and out the bottom of the tailgate anyways so I'm not concerned.
Here is a close up of the locking mechanism, one of the slide locks, that weather flap, and some of the trailseal on the side.
The side rails looked like they would dump water runoff right into the back of the bed when they first put on. I decided to route the trailseal over to the inside of the new bed rail and channel the water towards the back of the bed. This worked flawlessly a few days ago when I shot water from the hose that way and nothing was wet inside.
Originally I had the front water flap directed inside the bed, which dumped a lot of water into the front of the bed when I washed it. I pulled it out and over top of the trailseal that I put on the front of the bed and it looks like that would work 100x times better than the other way. As I said I'll report back when it gets tested in real rain conditions.
In conclusion, for less than $300 at truck alterations, this is a must have mod for your truck. You can open the cover up in less than 15 seconds and have full access to your bed. Couple this with the trailseal, and a pop n lock tailgate lock (I got the powered one, which I would recommend) and you can store whatever you want into the bed, and have the security that someone has to really spend some time digging to get into your stuff!