i use the gmmk pro myself and i really enjoy the knob. i ended up buying a second one just for work bc they weigh a ton and i wasn't going to constantly lug it around
totally understandable and if that happened to me i would also be very averse to trying the pro (but this is my first product with them). thankfully the quality hasn't let me down so far. my only mistake was trying a pre-lubed option on one just for the heck of it and it was def over-lubed.