Dai put more details on the pop top build
here.
We rented Magilla for a week-long adventure at the end of July, and the pop top worked wonderfully! Initially I thought I didn't like the 'tall' look of the pop top (relative to the low profile SMB style), but that opinion completely changed once we used it. Both my wife and I are short, but the additional headroom was extremely nice to have. With the top down and the bed panels moved out of the way at the front of the vehicle, there was plenty of room for us to stand up, move around, make lunch, etc. With it up, I never felt cramped--in fact, it felt downright cavernous up there.
The remote control activation is not only spiffy, it makes it easy to walk around the vehicle and make sure the canvas is tucking in correctly while lowering. With the insulation and 3 layers of screen/window/canvas, it had a 'premium' feel. My 20-month old daughter and I slept in luxury upstairs while my wife and 9-month old slept downstairs, but there was easily enough room to accommodate all of us up top.
Without a doubt, this is in the plans for our own build.