I have used them for many years and stopped using anything else. Now, if I am hunting a field edge, then a ladder stand is okay, but in the woods, especially for archery, it's hang-ons only!
I hated climbers because I just felt so open with no limbs beneath me. With hang-ons, I can get above lower limbs which provides great cover.
I have had Gorilla stands for years and like them. I just use the standard climbing sticks (cheap) because I have never had one stolen. I can take one down and put it back up in like 30 minutes, so I would call that "portable". I can strap my stand on my back and carry three stick sections in each hand and go about anywhere I need to.
Another tip. If you are afraid of thieves where you hunt, then try this. Use those climbing sections that don't have to be linked together, but just strap on the tree. Rapid Rails or Stagger Steps. They are expensive, costing about 100 bucks per three foot section, but they can be brought in and put on the tree quickly. Just put as many on the tree as you need, set the stand up, then when you leave take the bottom section with you. I would do this if hunting on public land, but would never go to that expense on private land because you can buy a 20 foot climbing stick for what one section of these cost. I guess it is possible to take one of the climbing stick sections off, but I have never tried that.
IMO, ladder stands are too bulky and hard to set up alone. Climbing stands are too open for me, but hangons provide enough mobility, ease of setup/take down and concealment to work most anywhere....
good luck with your decision.