We're both on Simvastatin and have never experienced any side effects, not a twinge, nil, nowt. We know two other people also on Simvastatin and they're the same, no side effects whatsoever.
Common sense tells me that most people who take it don't suffer any side effects, it tends to be the minority that do that we hear about. As with all drugs, if a cheaper version does the job then why not try that one first and save the overstretched NHS some money? I don't mean your mum Midge, I mean the GPs who prescribe.