When you are looking for a cash register you may want to skip the big box stores and head to a dealer that offer commercial grade equipment. Every day we receive calls from people that have bought registers from a big box store and have no idea how to use it, program it or fix it. Every day we have to tell these callers that we can't support registers that we don't sell and in the case of the Sharp XE models or the Casio PCR models we don't offer support period.
So make sure if service and support is important that you buy your cash register from a source where you can get help. Also remember that help is not always free especially if you did not buy the register from the company you are calling.