T45 - I know this thread is about #1 Phillips, but would you say the #2 Phillips Instinct handle is larger than necessary?
IMHO, the Instinct #2 handle is a 'problem solver'. Wether or not its a good everyday driver depends on your needs. If you have the $$ and box real estate, then its maybe still an essential option. If you need a mobile toolkit in space/weight constrained contexts, then IMHO hard handle.
Consider the Instinct 1/4 square driver handle (#2 size handle). It will routinely take off/on m6 HW at 10NM. But that is ph3 torque spec, as alluded to above. I really like the instinct driver handle, but the TM4CSA is also a classic and a much smaller form factor (w/square drive build into the handle).
Thus the GJ recommendation borders on 'Buy Both'. If you have the needs, the $$$, and space, etc. For those of us on limited $$$, space, or weight budgets, the Handhandle P2 and 6,4.