I have 2" Flash Cuffs for my lead hoses & I really like them so far. Mine stay together & only come apart when I want them to. They also seem to be holding up well. Only issue I had was a O ring came out & I just put it back, hasn't been an issue since.
We just did a 9 story building today & luckily I used a safety cord on my existing 2.5" Swivel Twist cuffs because they come apart no matter how much tape I put on them to snug the connection up.
I keep hoping Interlink will get the 2.5" starter cuff corrected & actually stock the 2.5" complete cuff set but I have to say it doesn't look as if they will ever get them so I'm stuck for now with better than the alternatives.