I haven't tried the one you've referred to, but it looks rather bulky and expensive if you have a lot of leverguns to lock up. Your choice of locks depends on what you're trying to achieve. In Canada, I must comply with our "safe storage" laws, and for this I use the following lock:toggy said:
I prefer this lock because the key is the same as the trigger locks that I use for my other firearms. I only have to keep one key in my range box to ensure that I can unlock all my firearms. Additionally, the lock is easy enough to open with a couple of sharp-pointed objects should I lose the key.
From the above, you can see that I didn't choose this lock for its "security", but more for its convenience and compliance with our laws. These locks won't deter a thief from taking your firearms, but they are a defense against young children --- that being said, if you have to rely on a lock to make your firearms safe from kids, you have other problems. Each lock is about $2.50 and sold by a guy on Ebay and Gunbroker; he goes by the name texas_bear.
