If you are a July applicant, you have still long way to go. It doesn't look like a good idea to take a medical exam now.
The reason is that the effective days of Copr is the same as the effective days of your recent medical examination.
I hope you know that the Copr is the document that confirms you are a PR issued by CIC and it's the document finalizing your struggle with CIC.
For example, based on the average time line of 13 months, if you take medical exam in Sept' and 11 months later, finally you get the Copr, then your Copr would have only 1 month of time to be effective, which means you have to finish your landing in 1 month or have to have another Medical Exam for the Copr Only. If the process takes more time in the worst case, your medical may be expired for Copr, and CIC would ask you to take medical exam only for Copr.
It's up to you, wish all the best man.
P.s) I took mine in Kitchener. They are kind and the price was very decent. And the result was uploaded exactly on the fourth date. I don't hesitate to recommend them to you. I hope you to find the best place for you.