Worst restraints?? Hmm i would have to say the restraints on Terror Rack which is an extremely old topspin by Far fabbri.
The terror rack is at a small park near me, called Pleasure island cleethorpes, and i must say its the most fearsome topspin i have ridden, or seen. I have a video clip of its cycle but have nowhere to upload it. Lets just say in one part, the seats are at the bottom near the station, then the whole car swings right over upside down and stops upside down. Then the arms take you right up to the top still hanging upside down and then right back down to the bottom again, before flipping you over a few times. It hangs you upside down for so long with these crappy little restraints that dont fit anyone. They are them shared restraints, you know, the ones where you have like a tiny OTSR to yourself which is rock hard and doesnt fit, and then just a metal bar enclosing five of you together. its so uncomfoartable, and instead of being too tight, its far too loose. Yes i like loose restraints sometimes, but on this i didnt, it was too far, especially for the type of ride. LOL.
Best restraints are those on air. They are so comfy and for the type of ride style it suits it so much. I havent had much experience with many lap bars so cant really say.