For the first few years I used a foot stool. Even though I am young, it still leads to pain in my leg/back. Plus I can't get the guitar at just the right height/angle.
I gave the De Oro suction cup support a try and loved it. I never ever went back to a foot stool after this. The De Oro Classica would be my go to suction cup solution if ever. I continued to use this for several years.
For almost a year now I've been using the Kris Barnett Umbra magnetic support. After using the Barnett, I refuse to go back to anything else. Here are the advantages:
-Adjustable. I can get the exact position that I want and making adjustments are a breeze. Since I keep the support in the same position, I can ensure that I get the guitar in the exact playing position every time, which helps for consistency. You can adjust both arms and you can even adjust the angle to make the guitar lean toward or away from your chest.
-Rock solid stability. The magnets are strong enough to carry the weight of the entire guitar and it really feels stable in my lap I never have to worry about it dislodging in mid performance. It has a non-slip pad where the support meets your leg, so it really stays in place. *Take note that if your guitar is heavy or has very thick sides, the magnetic connection will be weaker
-Attach and go. This makes a huge difference. Within seconds I can attach and remove the support. All other solutions or foot stools take more time and are more tedious to set up or detach.
-Small and compact. Can fit in most cases. Easy to bring around.
-Durable. The umbra support is built like a tank and will probably last me a lifetime.
-Doesn't mar the guitar finish. Suction cups can sometimes leave marks on a guitar, but these don't harm the guitar at all. *My friend however put his Barnett support on a newly French polished guitar and it left imprints*
I do have minor criticisms of the umbra, but overall the advantages far outweigh the disadvantages and there is no other support that even comes close. I've had the chance to try other supports like the dyranette cushion and the ergoplay, but for me the Barnett really takes the prize. I've installed the Barnett magnets in 5 different guitars to date. At first I found it really difficult and tedious to install, but now I've really mastered the process and found a method that makes things a whole lot easier, so if anyone ever needs some tips on installing the magnets, feel free to contact me.
"Success grants its rewards to a few, but is the dream of the multitudes.
Excellence is available to all, but is accepted only by a few." - Christopher Parkening