I love my Mockingbird stroller. I've had it for two years and added a second seat once we had another baby last fall. The customer support from Mockingbird is incredible, we had an issue where a bar broke and they replaced the entire stroller immediately.
This stroller is particularly amazing for city life / suburb life with great sidewalks... I used it MANY times as a grocery cart as well. (With my son in it.) If you live in a place with jagged sidewalks or uneven terrain, you might be better off with a jogging stroller, but this Mockingbird is beautiful and has served us well. (And is essentially an UppaBaby at half the price.)
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Love this brand and what they're trying to do.