With the Ultra 90 Thermalright has delivered a solid cooling product that cools well and comes at an affordable price.
Being able to use your own 92mm fan is a big plus for enthusiast users. This allows you to fine tune cooling performance vs. fan noise, giving you the optimum solution. On the other hand first-time users may want to have a fan included, just to save the extra hassle of finding a suitable one.
Cooling performance is good for this size of heatsink, if you need more cooling performance then check out the Thermalright Ultra 120 which is designed for 120mm fans.