if you use a loop it will increase your draw length. how much depends on the size of your loop. and the release itself also makes an independent difference. i like a handheld thumb trigger. truball are the only ones i know that make one without a 'click'. you can clip it on your loop and let it sit until you pick up your bow. i like the new extreme handheld with a talon head. i take the rope off the release and attach the talon head to my loop. it doesn't have a cocking mechanism so no click. some people like wrist releases, just not me. i want the back of my hand tucked/cradled against my face/jawbone
when i shoot. easily repeatable and solid. but its not for everybody. if you get a chance shoot a few different styles until you find what you like. this may take you several buys, and resells....... forever and on....