Hi,
I currently have a Zephyr and I have been finding work with it and haven't had anyone turn their noise up to it at all. So it hasn't lost me work. You do have to be aware of the weight limit on it. For example a good heavy build is Alexa mini, cinema prime and wireless unit with a battery or 2 on the sled, anything more starts to push the unit and you could have the gimbal shaft snap which is what happened to me (not ideal, few hundred £ in repair).
If you are new to Steadicam operating the Zephyr is fantastic to learn on and build a good operating ability from.
Message me if you have any questions and if you live in the UK or EU I have one for sale at the moment. But I can let you know about other models as well as I have flown most of the newer Tiffen rigs.
Hope this helped.