I've never heard of the maker, which doesn't mean much one way or the other, because there are a LOT of small violin makers around. (Small compared to companies like Cecelio, Stentor, Gliga, etc).  Not sure if I've heard of Sky Music before or not. I haven't heard anything bad, at least.

The only thing that bothers me about the description of the violin is that they go on and on about the looks of the violin, and say exactly one word about about the sound. For me, that's not where the emphasis should be.

Make sure they have have a good return policy, where you can check the instrument out thoroughly and return it if you don't care for it. It should be at least 10 days, and 14 would be preferable.  You might ask if they could post a video with someone demonstrating the sound of it, but if they don't have such videos attached to a lot of their instruments already (and most shops don't) you may not have any luck there. 

That's one reason a lot of us on this forum are here. Fiddlerman does do that, and many people have picked out the specific instruments they have by listening to him play samples on two or three examples of the same model and picking the one they like best. You can ask for particular characteristics you like, what you want played, how you want it played, etc.  (I was a real pest, so I know whereof I speak.) 

Fair warning, though. A Youtube video does not have the sound quality to let you tell fully how a violin sounds. You can compare two videos done with similar quality under similar conditions to each other, but no video is going to give you as valid an evaluation as hearing it live.  For ANY violin you buy, hear it live and have the option of sending it back before you finalize the purchase.