visit the HQ web site. you can order a free dvd- i've had mine for almost 7 years now- so i'm sure my info is way out of date...i know there have been some great upgrades in the past few years.
i can tell you they have been around for quite a long time- their customer service is great-
they are based in Utah-
when i first set up my machine i had a terrible time with tension issues---they talked me through the problem over the phone- are very helpful- knowledgable- and nice to work with...i've never been disappointed.
different set-ups cost different amounts- you should visit their site.