Product review (3 stars): With a Conversion Kit this is a great buy
I bought this unit to dispense Guinness and it works great.  I read a few reviews that complained of the cheap parts that come stock with this unit.  If you plan on buying a conversion kit to pour Guinness you will save money buying this compared to other units because you will end up replacing all the cheap stock parts anyways.  If you want to buy a unit and have to do very little to it - this probably isn't the best choice.  If you don't mind spending a little time and money making modifications this unit can be a great value.  Overall, you get what you pay for with this one.

A few things to be aware of:

Size: the unit was designed to fit (up to) a full size keg + the tiny 2.5 lb C02 tank that it comes with.  The 2.5 lb tank is going to be difficult to get anywhere to fill and impossible to get filled for the nitrogen mix needed to dispense Guinness (most places I've found will only fill 10lb tanks with mix gas).  You will not be able to fit a full-size keg + a tank larger than the 2.5 tank inside the unit itself.  To overcome this I had to make some modifications and run the air line out of the top of the tower and store the air tank outside the unit.  This is probably my biggest complaint overall of this unit as this is less than optimal and makes the set-up take more space.

Temperature:
This unit doesn't go below about 40 degrees which isn't that big of a deal if you're dispensing Guinness as the optimal temperature is 40-43 degrees but this maybe an issue for other types of beer. I have added a wireless temperature gauge (you have to purchase this separate) to avoid having to open and close the door to properly monitor the temperature.