I have the iq110 and I have used it on my performer and also on my wsm and i love it. My family (brother and dad) use bge and they both use gurus and other than a few bells and whistles I think my Iq110 is very comparable as far as getting the job done. I also work in a plastic and rubber injection facility and i agree with John on his choice of materials for the construction of the case and hose. I think its gona boil down to personal preference.
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Weber Performer,SamAdamsWeber,Smoky Joe,22.5 WSM, Weber Genesis E-310,red thermapen(the fast one)