Have to echo the Ecco sentiment. Beware, they have recently begun manufacturing some of their products in China, which is disappointing. The Helsinki slip on is still manufactured in Europe.
I would never buy Ecco's on line. Because they are hand made, no two shoes are exactly the same. It's best to try them on at an Ecco store or Nordstrom to guarantee the best fit.
Bulletproof, comfortable enough to walk 10 miles in and will give you years of service for $150. Not expensive in my mind.
.02 from a 15 year Ecco customer.