I was talking with an instructor using one of our books and our online homework system. Without any prompting she said she has used MyMathLab and WebAssign and XYZ Homework and she actually preferred XYZ Homework over the other two. Her main reason for preferring us was that we answer the phone when she calls with a support question. With the other systems, she has to submit a request for support and someone gets back to her in 24 hours.
So, if you are tired of pressing 1 when you call your publisher. And you are tired of submitting support emails, call us - we answer our phones.