Product review (5 stars): Works great after a little modification
When I first installed it, the sink wouldn't drain properly. It backed up even though we have a low-flow faucet. Worse, occasionally it would spurt a bubble of gray water, which could splash right onto whatever we might be rinsing.

I removed it and took a pair of scissors and snipped the points off the flaps in the center until I enlarged the center hole to about an inch in width. Now it works great. It drains well and still functions well as a disposal splash guard.