I'm not so much dissapointed with this line as I'm satisfied with what I already have. I have the sentinel leader, Crankcase, powerglide, Human Alliance Green Wrecker and Voyager Megs. they are filling out the collection, I'll definitely be getting Ironhide. though with Ironhide and Sentinel, it's tempting to wait and see if there are any sweet chromed up repaints released like the buster prime we got here.
You are going to be hard pressed to beat the rotf leader prime, and any of the ROTF Human Alliance figures I think, so for me those characters are already spoken for. Some of the smaller Human alliance figures are great, like the snow mobile, it's nice to see some distinctly different vehicles.
I don't particularly care for the mechtek stuff but it doesn't particularly detract either.
I am keen to see what gets announced at the SDCC. that will guide the rest of my purchasing decisions.