Your spoiled now! ESC controls on that machine... for a first commercial mower you got the Rolls Royce.
I really think you made a great decision on going commercial. Lots go with residential machines for the price but the quality of cut just isn't there. I lost good clients my first year using residential machines that didn't bag, now I have a commercial walk behind I would NEVER go back. Durability aside, you just can't beat the cut quality of a commercial mower....what I like is the fact that you can adjust everything as it wears, so belts / brakes are tight just like the day you brought it home. I suggest you learn more about the machine so you can maintenance and adjust everything properly. Keeping them belts / brakes tight make a world of difference!!!
Grats and good luck