No offense, but PLEASE do some searching on your own. Mike at Headfonia is a reputable source, he wouldn't lie if about anything fishy, and if he didn't like it, he would say so. He told me (look at the bottom of the review in the comments) that this is the BEST value in amps you can get at $129. He says it's powerful enough to drive up to LCD-2's, and another review says they used 250 ohm Beyerdynamic DT880 and 300 ohm Sennheisers HD600s with it. In that other review, (http://www.head-fi.org/t/568054/review-audinst-amp-hp-portable-headphone-amplifier), it is said that the highs and mids are nice and transparent, and the bass is on the level of the Leckerton UHA-6S.
My point is not whether or not you should buy the amp. Its that if you do a little searching on your own, theres a wealth of information at your hands. And personally, as far as reviews go, quality beats quantity.