An outstanding first commission! While it's pretty clear that you are utilizing some of Trostan's techniques here, you've done an excellent job in the execution. The colors are beautiful, and the linework and shading are fantastic as well. Great overall composition. I'm not overly fond of the font for the title, but that could just come done to personal taste. One minor suggestion. The border seems a bit simple and dull in comparison with the richly detailed landscape. I think adding a bit of texture, a distressed texture perhaps, might go a long way toward making the border come to life. But a wonderful piece overall.

Cheers,
-Arsheesh