Personally I thought they were pretty worthless -- the most-overplayed "classic" tracks from KFOG, Kiss-FM and a smattering of late-'80s/early-'90s thrown into a blender and repeated endlessly. They had John Grappone (previously of KFOG, The Bone and The Drive) as a jock for a while. And endless liners talking about how unique they were (not!) and how much "world music" they played (when in fact they just played the same Bob Marley songs KFOG played). Just your classic case of a station telling people (repeatedly) that they were hearing something adventurous when in fact they were getting the same old over-researched radio-consultant favorites.
I share that opinion. IIRC - The Wave started out being rather adventurous, actually playing a fair amount of unique songs in the "World Music" category. But what always seems to happen with "unique" formats like this is that they devolve into the same old over-researched over-played music. I recall turning in The Wave in mid-day and hearing mostly the same 70s era soul hits being played on KISQ, KBLX, KKSF (during the Smootth Jazz era), and (to a lesser extent) KOIT. You know -Let's Stay Together
by Al Green, Got To Give It Up
, I Heard It Thru the Grapevine
, etc. All great songs, but ones I've refused to listen to since the 10,000th time I heard them.