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
75 gallon semi-aggressive community tank with pressurized CO2, 8.6 gallon cherry shrimp tank
40 breeder reef
12G Rimless Club