Kind of worked, but not really

Tried very hard to get this to work. I did seem to work (sorta). I could only get one price rule to work at any time, otherwise, it completely messed up the display of my site – making it nearly impossible to use. In addition, when I did have the one working rule activated, it slowed down my entire site to a crawl. When I tried to set up more products for the rule, it was not only messing up the screen, but the bad lag, just got worse. I do not recommend. NEEDS LOTS OF WORK. Would like to give them more stars, but it didn’t really work.