IF that's really what KJung and others have said to you, I firmly disagree with them on this.
I think GB has proven time and again their products are quite good, and their CS is even better, despite whatever debates have taken place to date.
I currently only have a Shuttle 3.0 10T, but I like it a lot, and I've checked out a lot of their other stuff and also liked it a lot. Further, I'll probably be selling my combo, but it'll only be to replace it with another GB product (to be named at a later time).
I say post yer brainz out with the positive stuff. I can't imagine anyone having a valid complaint as long as it contains accurate accounts of your experiences, and as long as it doesn't include undeserved slams against competing products (those seem to be the two things that get posts in hot water around here... fabrications and flames).
Further, if someone is and endorsing artist, they're supposed to clearly identify that (as you do), so people have the opportunity to also take that fact into account when they read the posts... further making it perfectly fine to do so.
Bottom line, post up, don't clam up, and tell them to shut up. (but be nice about it)