I don't have any long drives in them since I just got my 4Runner running again, but I have sat in them a lot while working on the interior. Compared to the Recaro Sport seats I had in my last vehicle they are way more comfortable. They have much better lumbar support. The lower seat bottom bolsters aren't too high so it's still easy to get in and out while the upper bolsters are very supportive. The cushioning is firm but in a good way. I'm 6' 150lbs with a 29" waist and mountain biker quads to give you an idea. I'd say they'd be comfortable without being to tight up to a 34, maybe 36 waist.
I was originally going to go with the LG1, but Low Range Off-road had an awesome sale price on these making them cheaper. The seat heaters are super easy to wire up and paying the extra $50 per seat to have Corbeau install the elements in the seats is well worth it. I hate messing with hog rings.