Weirdly, I actually really like the GCI ones… I’ve never found them anything but extremely comfortable myself.
I agree on the Gravity Group ones, though… I think those Timberliner trains and restraints were one of my biggest niggles with Mine Blower. I remember the restraints felt quite tight, and I also seem to remember the Timberliner trains feeling a bit… unrefined, for lack of a better word, in how they tracked. Based on my 2019 experience, I don’t remember it being rough by any means (perhaps a little rattly at worst; certainly nothing too terrible), but I do remember those trains tracking a bit weirdly compared to the GCI trains. I probably sound crazy, but does anyone else know what I mean?
I’ve got to say, though, I think my least favourite restraints are still those on Olympia Looping… I really did not like those shoulder bars that dug in horribly throughout the ride. Actually, I think Colossus at Thorpe Park might be a contender too, with its very tight legroom and restraints…
At least we can take solace in the fact that roller coaster trains have grown considerably roomier since the days of Colossus, and that Exodus will not have similar legroom issues…