Idea for PWM to analog speed control

I came across a source (for $2.00 each) of:

The uA7392 is a 14 pin IC that is designed for precision, closed
loop, motor speed control systems. The motor speed is determined by
frequency to voltage conversion of the input signal provided by the
tachometer generator. The result of the comparison controls the duty
cycle of the PWM switching motor drive output stage. With data.

How difficult do you think this chip is to integrate?

Does this offer any benefit when compared to the PWM speed control in
the files section?

Jeff