This product works great! It is USB just as described. Yes the instructions are a bit confusing because of translation but it didn't take long to figure out.
Here are some tips to help you with instalation for windows 7:
On the instal CD choos file named Drivers. Install driver POS58 in the instal dialog it will give you the option to select a port. Do not choose LPT1 instead choose USB001 and procede with instalation.
In your POS system set up your page margin to 0 for all sides. If your pos is web based also take away the title, page number etc. from your page printing setting for your browser. You can do this under page setup.
If you want to spend more go ahead but this product is a great value for the cost.