It's just a healthy debate - do you think the extra cost is justified? Some say yes, some say no. Opinions are neither right nor wrong. The original post wondered what was so special about them...I'm curious what the answer is - it's a good question!
Eheim pimp #255
55 gallon semi-aggressive community tank, 13.3 gallon cherry shrimp tank
12 long reef
12G Rimless Club