It depends on the person. Just like with any brand of comfort shoes, they aren't right for every foot. Many people wear them for shorter bits until they start to mould to the shape of their feet. Additionally, I bought this style in black from two other vendors (I sent one back), and they did NOT have the soft footbed. I don't know if the Nordies version does, but it was a mistake in the description of at least two other websites.
If they do not work for you, they don't work. There are so many Birkenstock look-alikes out there this season that you ought to be able to find a pair of similar looking sandals that DO feel great. I personally love them, but there are other comfort brands like Dansko that are just awful for me, so no shoe works for everyone.
ETA: I tried the Target version the other day, too, and it would not adjust to fit my high-volume foot. The straps look adjustable, but they would not fasten to go over my high volume foot and the velcro kept popping loose. If you can slide most shoes on without evvort or adjustment, the Target sandals might work, though.