Guys I just ordered the new G4 Elite Fold a cover for my 08 Tacoma long bed. It should be in by tuesday, I'll post some pics once it is installed.
As was previously mentioned the G4 does sit on top of your bed rails allowing you to use the stock bed rails, the mounting is done with 3m double sided tape. The mounting instructions are very clear that this step must be completed in temperature >70 degree otherwise you will have problems.
The locking mechanism locks down to 4 pins that are bolted to the underside of the bed rail, these are fairly stout IMO as I was looking at the display earlier today.
You are able to open the last section against the tailgate via a single key lock that engages both pins on each rail, as well as the forward most section next to the cab with a similar lock.
I would recommend a tail gate lock in addition to this cover as it does not close over the tail gate.
I wanted this type of cover for most if not all the same reasons as mentioned in previous post's, I was not really impressed with the G2 version. The G4 is much more attractive and does not take away from my Tacoma.
I carry lot of diving equipment and need a compartmentalized (is that a word) cover that will allow me access into different parts of the bed at any given time.
I do like the personnel caddy they have on thier site too but good god they are pricey!