What do you like best?
It is a fairly straightforward website. On the first visit, you can easily begin using it. A few things might need a little explanation, but their support articles handle this nicely. I've been using Bill.com for 4 or 5 years now. I've only needed to use their chat support 3 times (2 of them concerning a few oddities w/a client accounting software change). Their chat support is WONDERFUL!!!!
What do you dislike?
The listing of vendors is a little clunky. You look at the alphabet, click on a letter and then scroll through to reach the vendor. I'm not sure why all the vendors just can't be available in a list. When you are posting bills for payment, the ability to scroll through the account listing is basically non existent.
Recommendations to others considering the product
It is definitely worth looking @ and considering before making a final decision on any bill pay product.
What business problems are you solving with the product? What benefits have you realized?
No, checks to write, no envelopes, no stamps. I really like the ability to pay vendors w/electronic transfers (payments simply do not get lost). I wish more vendors weren't so afraid of it. The Bill.com feature of e-mailing when a check has not been cashed over 20 days, is superb! Notifying a vendor about a possible lost payment before they recognize it, makes the client (and me) look good.