@chad_d_stud_twitter It's def. a tradeoff. Really depends on the usage pattern. We're running SCF on Lambda (as a Kinesis handler), with pretty high traffic density - so no real chance of cold starts, and are really quite happy with it.
That said, the memory requirements can be a bit hard to control (and keep down). Especially since startup time is directly correlated (more memory == more CPU power on lambda)