My experience is you want that second shipment over the first. If there was an issue with the initial batch the second will be better. There isn’t always a big delay either from first to second shipment.

I am waiting for reviews before I do anything. There isn’t anything my m12s doesn’t do now that I think I need. Don’t get me wrong if I needed a new radio right now I would get the m17 over the 12 I am just not sure there is a compelling reason to upgrade.