You can read my post about my experience here -
http://www.theshirtboard.com/index.php/topic,14636.0.htmlWe had one head go bad very early on, but it was due to user error (trying to recycle wax), but was replaced under warranty. We are still using that same head to this day, so from Mid 2015 - 2018. It's had some head clogs, but you can turn off portions of the head, and then my operator reopened it slowly to utilize more of the head and the clog fixed itself.
Don't quote me on this, but out of warranty I believe a print head is around $3k.
Wax is great, it sticks to everything, no need to worry about what emulsion, is well dark enough, stays put so don't have to worry about moving from printer to exposure unit. Besides printing a little slower than an inkjet machine, the other benefits make it a superior CTS in my opinion.
You won't be disappointed, and Exile team give great support.