I did and I don't advise! I've received a pile of nothing, seriously!
I am an April applicant, last month (5 months in) I ordered notes related to the applicant and the sponsor, then I received 39 pages of pure nothing!
In some kinds of applications like Express Entry these notes are enlightening when you're seeking for some special information or the real status of your application, but on our small world here it seem to be useless. Maybe in cases that a application is denied then it might be worthwhile.
As it was mentioned here before, CIC will probably touch your applications two times; upon received and after one year, near to the process deadline.
By the way, checking MyCIC today I've noticed a UPDATED status on the first page, but nothing has changed inside of the application. Maybe they will start requesting Medical for April applicants? Lets hope!