My sign-up to and purchase of the standard Mackeeper package was well and professionally handled by the person taking care of the transaction.
I have not used Mackeeper before so I am not familiar with its capabilities. My understanding before signing up was that the software can help not only to identify and get rid of any viruses and malware-but also other computer performance issues and problems. However, after conversing with the technician online through the chat function, it seems that it is mainly an anti-virus software that can also identify other performance and operational computer issues-but that fixing the latter for the most part require additional, and quite significant charges. This may be fair enough and may only have been a misconception on my part.
In any case, now having the Mackeeper software installed I will learn more about its functionalities and it may be able to do more than mainly identify and eradicate viruses.