I love motorola and I own the Moto G4 Plus and I am really happy even after a year with its performance and I thought that the next generation of moto G phones will continue to be great but that doesn't seems to be the case.
Moto G5S Plus is a great and feature rich phone and has awesome looks, many people will buy it just by its name but only to be disappointed, I have used this phone and had to switch back to the older Moto G4 Plus.
The first problem with moto g5s plus is that it is bulky and heavy, it feels uncomfortable keeping it in the pocket, you cannot use it with one hand and it is likely to fall if you even try ( beware! ) I won't break though as it comes witj gorilla glass 3 but it is prone to dents as it has aluminium body so you will have to hold it super firm or otherwise you'll regret. The older Moto G4 Plus is immune from all these dangers .
The camera was supposed to be ultimate like the previous generation but it is just decent and buggy most of the times, the shutterspeed it worse and the camera app lags many times.
This is definately not worth spending 16K on, there are other better options so make your choice wisely.
I hope this review helps, Thankyou for reading.
If you have questions, ask them in comments.