And some ratings from me:
Cowboy -5.0
555 - 4.5
Freedom - 4.0
And some comments/persomal impressions:
Cowboy - masterpiece. Best Marlboro-like flavor ever. Did I miss anything?
555 - also great. But in the pair Cowboy/555 I prefer Cowboy. However they complement each other well and make a great couple of juices to alternate on a daily basis. U can also mix them
Freedom - definitely interesting and I want to always keep a bottle for occasional use. To me it has a little too much menthol (or whatever that coldness is called) which overpowers any other flavors in this juice. I've read a bunch of reviews on SI web-site which mention some nuttiness. The only way I can taste any nuttiness is when I dilute Freedom with Cowboy or something else. Nevertheless, while not my all-day flavor, this juice is definitely a good treat from time to time.
RY4 - the bottle I have has some of that metallic aftertaste mentioned here. For this reason I do not want to rate it now.
Desert Joe - tried it as part of sampler pack cartos but don't really remember what it was like. Waiting for a 30ml bottle now to finally conduct a real "long-term" test.
The rest - well, wile I've tried all SI juices at some point but I just do not feel qualified to rate them. They are just not my cup of tea and I do not want to downgrade SI menthols, for example, just because I'm not into menthols.