Re: buys a company's products [snip - title too long!]
"I buy a company's products because a) I'm used to their way of working - I don't have to learn new stuff, b) because it's been reliable for me, and c) because their customer service has been satisfactory when I've had a problem."
Then you aren't buying them *simply* because of the company. There are transition costs to changing brand, you have (at least anecdotal) evidence that the brand is reliable, and (again, at least anecdotal) evidence that the customer service is reliable. These are definitely good reasons to choose a particular brand.