I can not justify spending 108 bucks on a OS that I can't fully check out give me 30 days full speed then were talking..
First of all - you can get the license for as low as 49€, or 79€ (depending on the hardware). Secondly - you can check the OS for
as long as you like, just reboot every 30 minutes (really, how long does it take to reboot? 20 seconds?). And I believe "as long as you like" is enough time to fully check out an OS.