I had, well I still have, an extensive use of the Pilot in documentary shooting, wearing it for hours in rough conditions (sun, humidity...). It's a very comfortable vest you can really trust in. Yes, the previous model had a weakness and my vest (plastic part) has broken. Tiffen immediately send me a new one, the new model with a different plastic type. It was in late 2013 and since then, there is absolutely no problem.
Also....There ARE buckles on the Pilot vest, and there is absolutely NO problem with velcro. Guess what ? I find this system more convenient than those of bigger vests, such my LX one because once you have properly adjust the vest to your body, the buckles + velcro make your settings last forever. Regarding audio, the Pilot vest is perfectly quiet, absolutely no problem !
For you video signal, no problem with a standard (non HD) Pilot system. Your signal will go in the Pilot stage RCA video input and there is nothing else to do. The Pilot's monitor is wired to the sled and will show your image, no need for anything else. If working with a HD signal, just add a DECIMATOR2 convertor, for example.
Some cheaper, knockoff models may look better because they try to imitate bigger rigs, while the Pilot may look like a tiny rig. The fact is, the Pilot is designed exactly as it should be to fit our needs : it is lightweight yet solid, precise and adaptable, and it behaves like a bigger rig.