Well I found Substance Painter a lot easir to learn than Quixel Suite and if you buy the Indie version you can still use it for commercial purposes and get it a lot cheaper. The Indie version also includes Substance Painter, Substance Designer and Substance B2M.
I bought it on a monthly licence and have been using it for about 6 months now. Basical you just export your model to one of quite a few types that Substance can import after you have unwraped your model. Once in the Painter you can then choose to paint part of the model by creating a Fill Layer and using a mask to mask the area you want to paint or not paint, or you can paint the whole of the model with what they call smart material. There are also a lot of brush types to use if you want to get close up and do any extra work that would make the model that much beter.
Once you have finished texturing / painting the model it is an easy step then to export the material to png, jpeg, bmp, ppm or many others.
There is a lot more to it than that obviously but those are the basics. What I love about this program is that there are a lot of textures / materials already installed and you can get more via the Substance Share that also allow you to use the textures / materials commercialy.
Allegorithmic also have a lot of tutorials to help you get to grips with there software and the forums they have are very helpfull.
Obviously I have decided to use this software and am biased but they do have a full featured trial version of the software. The best way is for you to download this, check out some of the tutorials and see what you think of it for yourself.
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