Depends how much your willing to spend. Vertigo is much better seeing as they can jump 7 feet + compared to flybars 4 feet +. But flybars are only 150-200 new, and vertigo are 250-350. so vertigo is the best choice but comes at a cost.
Probably Flybar. They're the biggest company.
The Flybar Pogo Stick was created in 2004. However, production and layouts for this pogo stick had started years before. You can learn more about Flybar at the Wikipedia. Once on the website, type "Flybar" into the search bar at the top of the page and press enter to bring up the information.
Many of the typical versions do, but some of the more advanced ones do not, such as the Flybar 1200 model, which uses giant rubber bands.
Gary Stewart used a Flybar 1000 pogo stick to set the record for the highest jump on a pogo stick.
I personally find the flybar 800 is better. I did a review of both of them on my site and I have used both but the flybar 800 I get higher on. I guess it is up to you to choose.
3.5 to 4.5 feet highly depending on weight of the rider and experience and practice.
Pogo sticks can be purchased online or at your local store, such as Walmart. Check out http://pogostickreviews.net/ for reviews and links to online pogo sticks.
yes
Yes, of course :)
No
It depends on who is using it, as well as how well the pogo sticks condition is.
No