Great plugin, but I've come across a bug. When I used an apostrophe in a template name, the 'template selector' box no longer appeared on the Sites > Add New page. Template selection was still available from the front end, but the backend no longer offered the box.
This was rectified as soon as I changed the template name to erase the apostrophe; the selection box returned in the back end.
I believe you should be able to use apostrophes in the template names, and so I think this is a bug that could be addressed to improve functionality.