I had a one piece 'Stitch for years and got used to the blue Power Ranger or Poppa Smurf jokes. I really liked the one piece for commuting and Iron Butt kinda stuff, but hated it for pretty much anything else. Go into a restaurant and you can't just hang it on a chair without taking up all sorts of space. With my big boots, I generally had to take at least one off, doing the parking lot shuffle. Couldn't mix & match if I wanted to with mesh jacket & solid pants. Etc.
The Tiez's are really nice looking and great in price. I've heard a couple people finding that their leakage is a pain, but then old 'Stitches leak in the crotch. Don't overlook their regular jackets & pants, too.
I'm happy with the couple of jackets and versions of pants I have now, mostly from First Gear. As mentioned, I can mix & match.