Hi, new guy here. I just started a fairly good sized project that uses all Siemens components. After 20 years of AB, it's my first time with Siemens. I realized I needed to learn STL to be able to do much with it. You really can't do as much in ladder/FBD as you can in STL, namely indirect addressing. The processor is pretty cool. It's a CPU317T-2 DP. It has two Profibus channels, one for I/O and HMI and one for motion control(DP Drive). I'm using the S7 technology add on software package that enables integrated motion control of up to 32 axis. I've spent the last month learning STL and I think I can get what I need with it now. It's kinda similar to assembly. Everyone said once I learned it I would love it. At first I was like, Wow, this blows! Now I actually do like it. I'm totally biased toward AB, but I like learning new processors and so far I give this one a thumbs up.
