People who, with limited forethought or constructive argument, bag a rotary engine because it's a rotary are misled. They are the same people who, if 10 years older, would swear that V8's were the only way and that "them turbos" and "that fuel injection stuff" were crap.
Don't listen to them.
Every engine (and car) has good and bad points. Rotaries suffer a little from reliability - mostly when maltreated - but that said I didn't buy one for that very reason and then spent twice my Toyota's purchase price in repairs. Go figure.