I'm surprised that people do not like Mitsubishi, coms is easy the only problems are as follows:
Documentation is what I call Chinenglish so the translation is rather poor, but once you get used to it it's decipherable, well almost.
Because they have made their later IDE's backward compatible it does mean you need to understand the reason behind using both symbolic & physical addresses (not going into that one), Ladder is a little awkward but no worse than any other platform, FBD is great, the ability to manipulate bits/words etc. by giving same memories a different symbol and type (providing it is a global & physical address) makes many memory manipulation very easy.
The in-built library of functions is comprehensive. Hardware extremely reliable, reasonable cost as is the software. The IDE runs pretty quick even on older PC's .
Siemens I liked the S5 & earlier S7, however, when TIA came out installing took ages, a couple of bugs where it would fall over at a critical point, RA ok like some of the features, however, the cost, the strong arm tactics of tech connect & incessant need to update firmware /software really got to me.
Other platforms I have used yeah, ok.
To sum it up a lot depends on your exposure to these platforms, the more you use them the easier they become to use (well there are a few exceptions).