First off, lets make one thing clear: The In Win 901 is not a gamer's chassis. It is for those who want a beautiful-looking system first and foremost. Sure, you can install fully sized components into the chassis, but its unique design limits it somewhat in terms of cooling choices.
Even so, the 901 does offer a good mixture of extras, so you won't be left wondering if you have given up too much to use a chassis with such a beautiful design. In the end, the biggest drawback you will have to live with is the limitation in regards to CPU coolers.
Considering In Win managed to put pretty much all of the elements from the 904 into the 901, I can only really repeat myself. Some of its highlights are the hot-swappable bays and the optical drive's unique placement. It would have been nice of In Win to include a fan right out of the box, though, to give the 901 a bit more value for its price. Overall, In Win has shown that they have the guts to gun for designer glory once again, and for that, they should be applauded. The In Win 901 may be expensive, and it may not offer all the functionality other cases in its price segment sport, and, heck, it is not nearly as amazing as other cases in terms of overall compatibility, but, oh boy, does it look good, and that is exactly what will matter so much more to the crowd the In Win 901 is for—it is perfect for those who do not need the size of the 904.