Does it run cool? How much power does it pull in comparison to the original?
I don't how much power the genuine 8701 will consume. Never measured because it's probably no more than the LS193 counter and PLL it replaces.
The components used on TOLB will consume about 12mA which should be about half the power used by the genuine 8701. This very small amount of power will not cause any noticeable heat. An ordinary red or green LED requires double that.
Added edit: Tests indicate a power consumption of 9mA.