I do like that VFD you linked to because it's got the pot already on it. This is the one I ordered for the last couple I got:
https://www.ebay.com/itm/302145135626?
While it doesn't have the speed knob, it's easy installed right on front. Like the one you linked to it has START, STOP, REV, ect on the front panel, but I still prefer to mount external FOR/STOP/REV switch for the the controls. Since it really needs an external OFF/ON switch to disconnect the power so it doesn't have to be plugged up each time, it's an easy task to add the 3-position switch.
Isn't it amazing how cheap those VFD drives are getting these days?
Ken H>