Every company experiences backorders. Great customer service also comes down to how they deal with those backorders to keep new customers happy, and get the product out the door as quickly as possible.
I did not have to deal with a backorder situation with Markham, so I had it 4 days after I ordered, but I have heard of folks who have had to wait for a week or two. When I was pricing toothbars, none of the other manufacturers could get one for my machine to a dealer in less than 2 weeks - most of them were about 4 weeks out, as no one seemed to stock one for a subcompact. In addition to the extra wait time, the next cheapest toothbar was $150 more than the Markham.