Think 'confirmation bias' when reading IMSB, oil or tire comments.
As others have said, the IMSB question has been beaten to death. Along the way, many have decided which option they prefer. Their comments and recommendations tend to reflect / justify those decisions.
Unfortunately, there aren't enough 'verifiable' facts available to tell the community whether one option is the clear winner. And even if such information were available, some would reject and argue against those findings because they run counter to already held beliefs.
Just so you know my confirmation bias...my 01S has the IMS Solution installed. It's been there for about 21 months. Why? I'd rather have a plain bearing than a roller or ball bearing ISMB. I could have opted for a lower cost option, but I don't worry about it anymore and that alone was worth the extra money.
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