Just got my Vibes in the mail today
They're second generation (have the strain relief).
Early impression: I like them alot.
The bass is very much there but still tight and not at all muddy. The soundstage is great as said by others. The isolation is virtually non-existent when the music is paused but when the music is playing even at low volumes I have trouble hearing what people are saying with both 'buds in, so it's fine by my requirements. At a moderate music level I can't hear anything unless someone is yelling right in my ears
The only thing I don't like so far is that the highs seem a little lacking for my tastes. For some music this is great and sounds better than most of the other buds/speakers I've tried, but for bass heavy rock and rap music it seems that the fine detail gets drowned out by the loudness of the bass. Note that it's not at all muddy or anything of the sort, it's just pure volume. The bass is very tight and controlled, just loud.
With the treble boost on in my iPod most songs sounds a lot better.
I'm guessing with some reports of the sharp highs they toned them down a bit with this second generation?
Note that this might just be due to it not having any burn in. Overall I'm very happy as they sound great for the most part, look great, and are very comfortable. Had no trouble getting a seal with the stock tips. (Use the mediums though the smalls work for me too)
ALSO, mine came with a black leather pouch rather than the gold leather that was shown in the reviews I read. I like the black leather better