The qualm I have with medications such as this is...does it mask a deeper problem, physically? Often, low libido can be corrected with exercise, proper dietary changes. Not saying that is always the case, but I'm just not a fan of racing to the doc to get the latest pill in order to alleviate this pain or ache, or help with this or that 'problem.'
Our society as a whole (in the US anyway) has major health problems that I believe contribute to a lot of sexual issues, from a physical standpoint.