Unfortunately, I'm yet to try the smiley's, I hopped on the Question mark bandwagon.
If given the opportunity, I would definitely put a few Versace's away. I only got my hands on a few for myself and some friends then they were all gone, only to return after I'd got some other pills.
From what I can gather, and correct me if I'm wrong, the Smilies/XL's and Question marks are pretty much on par with eachother in terms of strength and quality.
Versace's are also a high quality pill but, in comparison with the others, suffer a little in the strength stakes.
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Is Don, Is Good