I have run Tekin RS Pro, Speed Passion Reventon Pro, LRP Flow and Novak GTB 2 and the best esc by far was (and is) my Novak GTB 2. now Im not a "novak fanboy" or anything as I have had other brands of electronics but their acceleration and braking are incredibly smooth. I absolutely love it, and its a great spec esc for any of you 17.5 guys. the only issue and i mean the ONLY issue with novak stuff is that they have a tendency to burn up. and Ive had that happen but novak got me a new esc within a week and a half. The price of their stuff isnt as much as some of the more well known or used brands but they are just as good if not better. I recommend novak to anyone looking for a smooth esc.