Not much, but it gets annoying sometimes. Combat trim trims the plane to keep it level at MIL power and is tuned to for all ranges of speed limited only by the maximum trim deflection. As far as I know, it does not matter weather the nose is pointed up, down, or level, combat trim will keep it trimmed for 1G level flight. The problem now is, it's trimmed for 1.2Gs, thus raising the nose in level flight. Auto-level still works, but I'd rather not have to turn that on and off all the time.