I run one of these in both my DB01 and in my B44. This is quite possibly, the single best ESC you can buy, for the price. Reason being that it not only offers a massive array of tuning options, PC Programmability and very efficient throttle and braking delivery, but also because of its durability.
I bought one of these about two years ago, and it's still ticking to this very day in my DB01. I do suggest swapping the fan out for a Yeah Racing Tornado fan if you plan on running this as a Modified class ESC with any form of Turbo timing. Reason being is that it'll help you to squeeze that little extra bit of boost from your speedo without burning it out.
All in all, a very good unit. Would recommend this well over a Tekin, Castle or LRP system any day to any aspiring racer.