I support Jetpacks for my business and should be able to assist you on this one.
A Jetpack works great as a personal temporary and mobile hotspot. Once you start to connect multiple people to them the performance will drop. Performance will be further impacted if you happen to be VPN connected for any of your work. What you do with the connection will give you the final impression of a successful experience or not.
Jetpacks can take advantage of Verizons 4G LTE and newer XLTE networks in supported areas. LTE boasts speeds between 5 and 12 Mbps but can often be better. XLTE will top that when the infrastructure supports it in that area, usually around or higher than 20 Mbps. This competes with most low end Cable service providers and should be noticeably better than DSL or satellite connections. Mid to high end Cable or Fiber connections will usually perform better due to their cabled nature even if the advertised speeds are similar.
To know if the Jetpack will be an improvement or not I would first take a snapshot of the performance from the internet connection you currently have. Navigate to a speed test website such as www.speedtest.net and take a few tests. Based on these results we can help you evaluate the theoretical performance increase over your current providers network.
Something to keep in mind is that a Jetpack is a wireless device. It will use WiFi over 2.4 GHz and 5.0 GHz to communicate with your personal devices. If your performance problems are WiFi based then a Jetpack is not going to make a noticeable difference. You can work around WiFi problems by enabling USB tethering on certain devices or exploring other devices such as a 4G LTE Router or a USB Modem and CradlePoint router combo.
As far as data goes, teleconferencing is about as data intense as you can get. Metered internet connections are not ideal when video and voice are the main applications. The question is can you still get value out of your conferencing program for the premium you would pay to conduct that work over a Wireless ISP or not. To some people they can justify it and the costs are acceptable. To others, such as most home users, the cost is not acceptable.
Let us know if you have any other questions.