Great mixing, I could not think of one thing to add. Everything well balanced, things that needed to be heard were forward, and things that played a support role were just that. No over the top effects. Maybe it's just my old ears but I thought the vocals could've been a touch more up front.
If I were to point someone in the direction of "this is what you should be aiming for in your mixes", you would be one of my choices.
I myself have not an original bone in my body and love the covers. My better half, she is the creative one and is the writer of the songs, I am just the piano player and engineer. But I think I will listen out for your originals. Does it mention if any of the songs on your site are originals, I couldn't differentiate. Maybe that's my only criticism.