I just used one of the Saleae instruments for the first time the other week (I'd had my eye on them for quite a while before that) and it's great. Personally I

I just used one of the Saleae instruments for the first time the other week (I'd had my eye on them for quite a while before that) and it's great. Personally I sometimes want to look at analog signals, or signals that are a bit faster than what the Saleae can handle, so for me it is more of a complement to a scope (which I do already own) but for people with slightly different needs I can easily see how it could handle most everything they might otherwise use a scope for.