I misplaced my cheaper rubber-sole-and-nylon-strap Tevas before our honeymoon, so we ended up buying a pair of these ECCOs at a mall in Honolulu.  I had a hard time paying over $100 for sandals, but they have turned out worth the money.  I wear a women's size 8 in running shoes (Aasics, Saucony), and the size 37 Ecco fit me best.  I bought the night shade/moon rock color.  I've experienced several negatives, but I still love wearing them every day, so I still give them 5 stars.

Pros:
-Long-lasting.  I wear these for work as a nanny and these sandals have survived two springs, summers, and falls of countless long walks with almost no wear to the tread.  The velcro is still in great condition.
-Good grip.  The tread is similar to a hiking boot pattern--providing good grip for climbing on rocks and uneven terrain.
-Supportive.  My hips and knees ache in typical sandals (even at my age--26), but these are as supportive as a good running shoe--no aches!  Perhaps due to their thick sole.
-Form-fitting.  The toe rounds up like a running shoe rather than a cheaper sandal, for more natural walking.  The sole and straps are not bulky.
-Padded, breathable straps.
-Fabric-like covering on the foot bed.  They are more breathable and comfortable than simple rubber foot beds.
-Washable.  I was hesitant at first, and remain hesitant to do this often, but I washed them in my front-loader with some rags and let them air-dry.  Made them look brand new.

Cons:
-Adjustable straps: They are just barely tight enough in their tightest fitting.  I wish I could tighten them more, especially for hiking and light climbing.  I have pretty lean feet, but I still think they should've made them more adjustable.  I also developed blisters early on from some of the thread on the straps.  Socks, then Bodyglide prevented further blistering as my feet adjusted.
-The foot bed waves: I found these quite painful on the soles of my feet.  My feet have gotten used to them, but I still feel discomfort from time to time.  But, I'd rather have my feet ache than my hips or knees.  It seems other reviewers enjoy these waves.
-Slow to dry: They take over 8 hours to dry if they become wet.  I use my cheap Tevas at the beach for that reason.
-Heavy: I coudn't justify the weight for bringing these as extra footwear on our 4-day Continental Divide Trail backpacking trip.
-Smell: My feet and shoes don't normally acquire an order.  My shoes usually smell new or neutral.  But these shoes seem to gain a stench that I occasionally sequester with a good scrubbing or machine washing.  Perhaps I get the material wet too often (about once a week, in the rain, at the beach, etc.).