I use the GX 49 every day and I have done for months now.
Primarily, I got it for use in music production, with no intention of learning how to play well. But I started learning because of how natural it felt to play compared to what I had used before.
It feels great for its price! The only downside is the simplicity of it and a slight lack of features, but I don't expect more in this price range.
All in all, the GX 49 is a priceworthy controller if you're looking for an entry into music production and/or if you want to learn to play.