I got all 3 sling shots as a gift on fathers day and now I'm working on some testing so I can give you guys some good feed back. The short review is they they are great and I would suggest them to anyone who wants to increase their bench. The original is probably good for most people. Please ask any questions you have about them.
Reactive(blue): Gives a little bit of carryover, mild support and compression at the elbow, comfortable and soft material. Great for DE work, increase the reps you can do slightly, or for light carryover to hit your raw max easier or go slightly above. raw bench 405 (IOR), reactive 415 (POR)
Original(red): More carryover, more overload, and more weight on the bar. Much more pop than the reactive, this one is made for moving bigger weights. Material is stiffer and gives more support and compression at the elbow.
Maddog(black): Double layer of the original. While it is thicker it doesn't have the same stiffness that the original has, but that's not a bad thing, I find it to be more comfortable. You get the benefits of the other ones, but with even more support. Ive done 462 in this one(IOR). Dumb KG plates, I wanted 430ish. Very heavy duty, I'd only get this one if you bench over 400 OR are use to getting alot out of a bench shirt.
Fist off, I had tried a Maddog sling shot and a super ram before. The Ram fit more like a bench shirt, but it only really helped me right off the chest then gave out. Almost like doing a 2-3bd press, while still going full ROM. The sling shot gave more support throughout the full ROM and allowed for more reps and more overload. This depends on which sling shot you are comparing to which ram, but again this was the super ram and Maddog slingshot.
I was only going to get the Maddog and only planned on using it when warming up for shirted bench. (raw max 405 but need 500 or more to touch in my shirt, depending on how I put it on), But I have an awesome wife and she got all the reactive, original, and maddog for me. I'm glad she did because they are great tools to add to the training mix. The elbow relief and compression is another excellent thing the sling shot provides.
As for sizing, I'm 220+, cold arm measurements are 16"+relaxed/18"+flexed, and I wanted to be able to get it on and off by myself, so I went with 2XL, which fits perfect.
Here is my first time in mine. I wanted to feel them all out and get a rough idea of the support each one gave. I repeat the weights with different slingshots so I can feel the difference and see the difference in bar speed.
*I cant post the link yet, but its on my youtube channel. link in my sig. vid is "Sling Shot Test"
Right now I'm doing some testing on ME bench days. Tested my raw POR(pinky on ring) 1rm at 375, the next week did it in the reactive and got 415. I'll do the original and the Maddog, then I'll retest my raw max.
Thread: Sling Shot Review