This review is for the 110 cm (43.5 inch) light/silver version of the viking.I spent alot of time looking for a decent lock..went through everything from kryptonite to hiplok to cheap masterlock shoe-string cable locks. I wanted something light and long enough to comfortably carry over my shoulder (like a sash), yet strong and solid enough to secure a mid-range (in terms of expense), nice looking bike. I wanted a chain as U-locks are too limiting, especially in the few spots I have to leave my bike regularly.This thing hit every mark! I'm no bike lock expert, but to me? This thing is beastly, definitely overkill for my area where alot of people leave their bikes entirely unlocked for hours at a time. Cable locks are the norm around here, even on E-bikes..but theft happens everywhere and it does occasionally happen here. I'm in no way suggesting you do so, but you could probably (for sure) use this thing for self defense if someone tried to steal your bike out from under you. It feels very well made, and the lock itself is by far the smoothest I've ever used on a bike lock..no sticking or anything, and the magnet is a nice feature. Easy as pie to lock/unlock. Mine came with 3 very nice, car-quality keys and a code to register them.The chain links themselves feel solid, certainly hefty enough for a silver rated lock, but realistically could still be cut in a few minutes if a thief had the right tool..it would definitely take two cuts to defeat however. Being a silver rated lock, it should be able to withstand up to 3 minutes of persistent attacking by a determined thief with tools (bronze is 1 minute, gold 5+ etc). Also, the neoprene feels to be high quality, it won't be easily damaged from general daily use and is sufficiently waterproof.All in all I'm more than happy with it. I don't even notice that I'm wearing it after a few minutes with the way the weight is distributed, but it may be too heavy for some..and it would not be convenient to transport on a ride without wearing it over the shoulder..way too beefy to wrap on the bike itself imo, and would add significant weight to a pack..I can only imagine how hefty the gold version is, but I'll still be getting one when I get a nicer bike one day!Edit: a larger person may want to get the 55" if they want to wear it sash-style, I'm relatively skinny at 135 lbs and the 43.5 fits perfectly with little slack.