Hi Kali1,
I just got my STS Tower for Christmas. I use my step with five risers on each side so I can use my long step as a bench. I have all those risers because I have the High Step and the Long regular step and I have the slanted risers. If you stack the slanted risers so they fit with wide side out and narrow side in they are the same level height as 3 risers. I personally like the STS Tower because you can assemble and disassemble it in less than five minutes and it is easy to store under a bed or in a closet or something. Its very space friendly for storage. I really love it and you can use it to do some barr exercises, push ups, or pullups. I'm extremely happy with my tower and have no issues with it. I did look at your link and that is a very nice bench I just don't have room enough to leave it sitting out all the time as I need the available floor space for working out. If you have plenty of room and want the bench you showed with the link, go for it. Either way, enjoy whatever you decide to get.
Best wishes,
Nora