At around $20, it's the cheapest way into the Sonicare ecosystem with a built-in timer. Reddit's consensus is clear: the timer is all you actually need.
Don't overthink it. If you're new to electric toothbrushes or buying one for a family member who won't use the fancy features, the 1100 does the job. Everything else is a gimmick.
“Buy the cheapest Sonicare that has a timer. That's all you need. Everything else is a gimmick.”