I just got the car back this evening from the shop and let me tell you it is a night and day difference from not having SFC's to having them. With the solid motor mounts I really thought that my vibrations while driving (even normally) were caused by the solid motor mounts. Well subframe connectors went on, I got in the car and I haven't been able to stop talking about how amazing the car feels with them on. I have MM full length and it is awesome. I don't get the vibrations until about 4,000 RPM now and even then it's not like it used to be. Before the SFC the car felt like a go-cart almost, now my seat is more comfortable (it almost feels like its been raised but I'm not sure if it has) the car is smooth, and I didn't know what body flex was... but now i know it is what I no longer have.
I'm thinking that i can get into the 8's in the 1/8th just from having the SFC's on.