The staff at the clay lane clinic where very friendly - no problems with them, BUT they only SUPERVISE from a distance, you conduct the test your self! In fact I had to help my elderly brother with his! False advertising on the site NO Professionally trained staff conduct the test- it’s. DIY job! And they charge you a lot of money for it! On the plus said I did get a prompt refund for a cancelled test and friendly service. MY big problem is it’s DIY! .