About to invest in room treatments; GIK, RealTraps, DIY -- what is your experience?


I'm reaching the point soon where I'll invest in some treatments for my two channel listening room. Standmount speakers with tube amps. Room about 28x14ft with low ceilings, 6.5ft. Probably different kinds of treatments are needed. I'm not exactly sure yet what I'll need or how much to spend. This is not my final listening room, but I won't be able to configure another one for a few years.

I've seen many people tout GIK on this forum and I'm already communicating with them a bit. I will also reach out to Real Traps and possibly others. I do not feel bound to go with just one company or solution, so if you've mixed and matched, I'm curious about that, too.

Any recent comparisons between these two, or others? Do you have stories of good or not so good products or service? Any comments about the value of competing products? I'm not super handy or have a lot of free time, but DIY is also considered. 

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The "man cave" in my former home had terrible bass.  No matter what the bass line was in the music, the room added a single loud note.  I bought a miniDSP UMIK-1 USB connected microphone and REW (roomeqwizard.com) to help me position the bass traps I purchased from ATS Acoustics, eventually installing 10 of them to mostly tame the errant bass response.  My wife referred to my "man cave" as my "padded cell".
There was someone on AudioCircle complaining about very long delays in order fulfilment from GIK.  No idea if they're swamped or may be having supply chain problems.
Or they are having problems working at full capacity while keeping people safe. Not exactly an essential business.