Got these in yesterday and opened them this morning. Glad I decided on these over T100S. First the reviews on consistency of spin and playability between the 2 seemed to be really even all over the internet. The 2 things that swayed me were price (getting a 5-G set for $350 is stupid) and durability as everyone has raved about the durability of these MIM's. The eBay seller of these seemed to be more of a yard/estate sale reseller than a golf reseller as they had all kinds of other stuff for sale so it's hard to know how many rounds these were played, but they look phenomenal. You can tell they were played some on the face, but that's about it.
Having owned both, I think you made the right choice. IMO the MIM feel better then the t100. Way more forgiving, and for me front to back numbers were better. The blade length is a touch long on the MIM to my eye, but that’s just me being picky!