The ZE 6 is a solid machine for the money.
Proform gives solid quality in this price point with better features than its competitors. The warranty is not great which is not too much of a problem since their warranty service sucks if you have to use it anyway. Just understand with ellipticals that you get what you pay for. You can get a decent machine at this price but you can have service and features too. You just have to pick your own poison.