I saw a few GIK panels at RMAF 2018, and I wasn't any more impressed by the current build quality though none of the panels had the obvious defects (like staples having completely missed the wood frame) that mine did.
FWIW, I've been very happy with the ATS Acoustics panels I sourced instead.
Really, it's up to you and what you expect/demand; I can't say the GIK panels didn't work as designed, I just found the way they did corners to be less than I had hoped.
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