The worst of the worst. The worst of the worst. Their employees who barely speak English took a sweet 1 hour of checking everything around me. Showing my pockets, tattos, behind ears, remove two 50" monitors form the desk on the ground, removing everything from the shelfs and flowers on the ground. Meanwhile, while running back and force i really started to want to go to the washroom and i was refused. I have failed the exam because i simple had a choice to pee myself or to complete an exam. I don't understand why would any large company go with this BS! Minus 100 stars of 10!! Please, close this company and stop making people suffer!

Bad experience with inconsiderate staff with attitude; supervisor even less helpful and with worse attitude Staff with attitude started bad experience ; provided my drivers license for ID ; Staff didn't except written certification of completion of training as prerequisite for testing ; Oakstone representative provided certificate of training but unacceptable by staff ! Finally allowed to take exam Passed exam but staff member lost my drivers license , needless to say they say exam maybe invalid due to lack of ID

Horrible Service Can't believe CSI uses this terrible service. I logged in for my exam. Got my security check done. I waited for my proctor for over 15 minutes and no one showed, so I disconnected and tried to reconnect. Now it says my confirmation # doesn't work. Tried all the troubleshooting on Prometric website and after several attempts, finally got a person on chat who couldn't help me. They referred me back to CSI who says I have to reschedule my exam. And they wouldn't even do it right away. If you have other options, don't go through CSI.

The booking system is almost impossible… The booking system is almost impossible to wade through. It's like it was designed by someone that had never used a booking platform. Why companies use Prometric I'll never know. I tried to book an exam for one of my staff and ended up, after 30 minutes of circles, giving up. I'll be complaining to The CIOT about this too.

Not even one star Not even one star. I tried to schedule my exams and spots kept getting filled within seconds. It pushed me a month back so I quickly scheduled what I could. I called to ask if I could get in any sooner and I'd have to pay a rescheduling fee of $35. The only reason I scheduled it was to secure a spot to not get pushed back even further hoping they could make some accommodation. Also, they couldn't help me change the order of times I already scheduled same day without paying 3 different rescheduling fees. Very ridiculous. I'm asking for minor changes.