Absolutely agree with the above! I just received mine yesterday and am very happy with it.
The amp. comes in a nice box slightly longer/thinner than a deck of cards, with appealing packaging design/graphics (very suitable for a gift). But then, when you open the box, this small rectanguler piece of black shiny plastic comes out, the entire amp–just amazing. It’s about the size of the Clip minus the back clip, but only about 2/3rds as wide. Nicely engineered (although I would have preferred matte over shiny plastic–personal preference, to avoid fingerprints).
A nice sound enhancement (but subtle–the Clip is good to begin with). To my ear, the bass noticeably is enhanced (but is not overpowering), which those who like enhanced bass will like. Sounds are slightly more clear and separated, and top notes mellowed slightly (but not muddied–just slightly softened, lessening any harshness). The general impression is that the music sounds somewhat fuller, and seems to flower out more than without the amp–I especially like this.
For those wanting volume enhancement: I was surprised, but the sound really is increased. By my ad hoc measurement, it’s about 4 clicks louder (using the Clip’s volume switch) than before–very measureable and noticeable, and requiring that the sound be turned down.
In the end, recommended, especially at the $8.50 or so shipped price, that just can’t be matched or even approached. The seller is fine (although not very responsive/helpful to questions–unfortunately, typical), and the item took 12 days to arrive to the U.S./West Coast (on a Monday after the weekend–there could have been some delay there) from Hong Kong.
(Oh, a small instruction pamphlet also is included, using stereotypical (and sometimes indechiperable) pigeon English; but not a big issue, as the amp. is so easy to use and its operation can be ascertained through the device itself and pictures or words on it.)