I have a masterlock street cuff. MTBR has some negative reviews re: its bicability, but I haven't been able to bic mine. Or papermate it. Or (insert pen barrel name here) it. Doesn't mean it's impossible... just difficult. they also say the jointed connector between the cuffs is a weak point- but I fail to see how. Having decent experience w/ bolt cutters, I would say it would take at least the ones with 2' arms to have enough leverage to break the connector or shackle arms. That said, I have routinely locked my bikes up with it in a parking garage by my work and they're... well... still there!

If you get it, I'd recommend slipping one shackle thru the triangle in the back, thru the rear wheel, locking to it, then locking to whatever you're locking to. This protects the connector with the triangle and wheel, and also your rear wheel. For added security, pop your front wheel off and thread the cuff through that, too. This way, leverage 'attacks' can't be used w/o seriously compromising your bike or the wheels, and boltcutters can't be used very easily, either.

All that said, though, if they *really* want it... they'll find a way.