Treesteps are a PITB to put in, they damage the trees which landowners don't like and on public lands they are not allowed anyways. I will never use them on lands I don't own, because I don't want to damage the landowners property. The steps do damage the valuable part of the tree. This is different from cutting off a few small limbs to open up a shooting lane. Tree loose smaller limbs by natural causes like storms and the damage is usually minor.
Climbing sticks are very good, if installed correctly and if they're taken down after the season, belts checked for damages and wear. Now, all new belts have expiration dates on a tag on them, so check the expiration dates and replace them if necessary. There are also other systems available than sticks.
If you want to hunt real mobile, use a climber. If you want to discourage theft, remove the first stick and leave the others on. Usually it is quite difficult to be able to get the second stick down. Pretty much forget about the third. Someone have to make a serious effort to steal your setup.