I've got a 1st generation GigBob and I've been very happy with mine.
Random unsolicited gear input: Check the screws that hold the brackets used to secure the oar mounting plates to the top-deck. They can work their way loose. Lose one and you won't even notice, but when the second of three falls out it'll become evident in a hurry, or at least that was the case with me when that happened mid-rapid. Thankfully it was a mild-drop, and could hike back to the truck to get a spare screw and a screwdriver, then finish out the float. If that'd happened on a multi-day trip my downstream progress would've been a fair bit slower...
Since I've used mine for multi-day trips, plan to do so again, and would like to avoid a repeat of the above experience I ditched the original screws, drilled through the oar mounting plates, ran machine screws through from the bottom, then secured them in place with screw caps + lock washers. Almost certainly overkill, but I'll have that serene feeling the next time I launch knowing that some other random mechanical failure will pop up instead of this one.
I wasn't exactly going light on my multiday (one of the plusses of these boats is that you don't have to go all that light, at least compared to backpacking) - but I found that using one of those elastic mesh cargo thingies made securing the load on the back fast, easy, and secure enough for anything that I'd want to run in a loaded GigBob...
