Hi gstacho,
I've had my FA-135CE for 7 months now and I'm really happy with it. I like its brightness with 80/20 strings, and its fretboard with its nice radius which makes it very easy for quick chord changing, but if I play fingerstyle, I find it less roomy than my flat fretboards. I don't think you have to worry about quality when it comes to big name brands like Yamaha, for its cheap price I think it is superb. I really liked the Walnut fingerboard on it, but when I lightly lemon oiled it on string change, it darkened the wood and lost its shine and smoothness, so now it's not very good for finger slides. If I had another one , I would not oil it and just let it be as I don't get extreme cold/dry weather here in London.