Pre-Packaged Medications

My mother is interested in having her medications pre-packaged. It is where the pharmacy puts your medications in pre-sealed and labeled bags by date and time. It seems really convenient and appropriate for her needs. I have found two major companies and a few regional pharmacies providing this service through the internet. The bigger companies are PillPack and CVS. I'm looking for consumer reviews on these services. I found a blog with 83 reviews for PillPack and the reviews were dismal. I can't find any reviews on CVS's service.  Does anyone out there have any personal experience with these services or similar?