TMT-
I'm assuming you're in the military where functional strength is needed everday in your job. I'm going to share with you the input I recieved from a soldier who staes his measurement for success is based on sustained performance in the field.
Since using the TRX, I have completely eradicated my lower back and knee pain as well as increasing my pushups by 20% and reducing my run time by 10%. By capitalizing on the principle of instability, all TRX exercises force the user to engage their core and increase their balance. Additionally, TRX exercises focus on developing coordinated muscle effort. Instead of lifting weights in a single plane, TRX exercises incorporate multiple body parts and multiple planes into a single motion, thus mimicking the way that a Soldier uses his/her body in combat and in life. A strong core allows Soldiers to maintain their posture with heavy body armor and properly move their body through the battlefield without straining their back. The increased balance is absolutely critical, especially in areas of rough terrain, such as here in Afghanistan. Finally, muscular balance and coordination reduces injuries and increases the Soldier's ability to apply functional strength to their daily tasks.