We've never had a problem with ours either, but it isn't expensive.
Actually, you may want to rethink the Mac purchase. I have one and I love it, but for Disney we stick with our $40 Century stroller. It doesn't fold quite as small, but it is very light. We love the large basket, the cupholders and the tray for the baby. It reclines and is more shady than the maclaren.
If you just want a nice umbrella stroller, then go for the Maclaren!