J.S.
Until you get used to toning shoes, I wouldn't wear them for a long time. The ones I have are really comfortable but it can tire you out.
I have MBT mary jane style. I like them for dressy winter wear. I find them comfortable. the one drawback is the super thick sole thus making them having. you don't notice the sole if it is the same color as the shoe. MBT retail around $250. I've had them for 2 winters and they haven't worn out.
I also have earth antigravity sandals. they are some of the most comfortable sandals I own. No thick sole or anything that makes them look funny or like a toning shoe. they also aren't heavy like the MBT's. My earth sandals I got for $80. they definitely are cheaper than MBT but still seam to last.