I would be careful buying this add-on unless you only use the default style. After we paid for this add-on and it didn't work on our 2.1 style, the developers reaction was to either let our style dev worry about fixing it, or he said that I could pay him even more money and then he would fix it.
When was the last time that you bought something and when it didn't work, the manufactures reply was "Pay us more and then we'll fix it"?