I’ve owned and used just about every suspension strap system on the market today including the TRX, Human Trainer, Jungle Gym and many others.
Truth be told, I much prefer my own home made set up, not because it’s cheaper, but because it far more adjustable and ergonomic. It’s also much more versatile.
One of my favorite things, is how I built the handles. Almost every handle out there drove me crazy, and I figured out how to placate my super picky demands with these: