Per our terms of service, we do not offer refunds or have a money back guarantee. So it is recommended that if you want to try our service prior to committing long term that you order on a monthly basis.
Also, we encourage end-users to review our test files/IPs prior to signing up to ensure they're happy with the latency/speeds that they can achieve within their region.
Our looking glass can be found here (just select the location that interest you): http://lg-lax02.racknerd.com/
We are here 24/7 to help you solve any problems you have, we will ensure all your issues are handled nicely.