That's John. I ordered a pair of TD15Ms as part of the group buy a few months ago. I have NO idea when i will get them

but I will eventually. It takes patience to deal with AE and it sounds like in your case you couldn't even get your order in (things seem especially problematic with the AV series woofers)
The Lambda drivers are among the best of the best. Used in the highest end products from Audiokinesis, Salk, Vapor, Seaton, Pi.
The problem is AE is a one-man operation. The customer service is the assembly is the machining is the accounting... He's had staff of 6-7 in the past and basically fired them for not doing their jobs properly. It's a small company fighting to stay afloat, hopefully someday he can get things together as far as staff. I'm being patient with my order, at least. I wouldn't recommend products using his drivers, if the drivers aren't in stock and the buyer isn't patient.