Yeah, but someone in the store might be able to outline the pros and cons..
It shouldn’t be the case that reading up on something for twenty minutes before going to the store makes me much more knowledgeable about that something than the salesperson.
The only time in recent years I can remember when someone could actually tell me something I didn’t know was when I was buying glasses†.
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† It was a spontaneous decision, so I didn’t read up on it beforehand but I did some reading afterwards and was utterly confused. There doesn’t seem to be much good information about glasses on the web.