I'm with Macbow. I just don't trust the stuff--works hand-in-hand with Murphy's law. I've seen it go--hard to tell when it's getting a worn spot, when it goes it goes all at once. A buddy of mine lost a tournament because of it...at least it wasn't a big hunt.
I don't think BCY even sells mono anymore. It's cheap and all, but...
I make a lot of strings... a LOT. I average well over 1,000 a year, and have for several years now. That's just me working on them, no helper.
I use primarily 62XS and Halo. I forget how many strings I can center serve with one spool. I think it comes out to around $1 a serving...less than fletching 2 arrows with feathers. A lot less than one shaft. A lot less than one broadhead. Etc. etc. etc.
I'm as frugal as the next guy, but there are some things I just won't scrimp on. Just my opinion. I could save myself a lot of money by switching to a cheaper serving material, but I won't sell something I wouldn't use myself.
Chad