Go ahead... give it a try
Just like in your favorite music store, you can try out gear before you buy it.
To demo a piece of gear, simply click the "Try" button instead of the "Buy" button.
Once you do this, the piece of gear is unlocked in your copy of AmpliTube and incorporated into your signal chain for a period of 72 hours, and you can use it however you see fit.
After that, it goes back into locked status and will remain there until you purchase it.
If you don't purchase it, you can "re-demo" the gear after a six-week period.