Sorry it took so long to get back to your question. We've been entertaining relatives from the UK.
To answer your question as to how it plays, it plays very nice. I do have a slight stumble with the G#, C# key on the side. It seems to be a bit higher than some of the rentals I've had. I'm sure it will be fine after I get things broke in.
The only thing I was disappointed with was the Ligature. They seemed to drop the ball on that. It looks nice but when I used it the first time it felt cheap. It feels like the screws are going to strip out or snap if you go just a little bit tighter. I purchased a Rovner Light Ligature on the weekend. The mouthpiece that comes with this horn is a good one.
I tried taking down the picture that I have posted of my Selmer AS500 but I think that that is something that you have to do as administrator.