Every "extra" (face cradle, sheets, extra padding, rounded corners, etc.) costs extra money, of course. The people at Oakworks, Inc. (http://oakworks.com) were extremely helpful to me in making decisions about my table. I talked with a massage therapist and a Reiki practitioner, and they really knew the various features and were happy checking out questions with other representatives if they didn't know the answer to a question.

weight - do you plan to carry it to other venues?

wood versus metal (wood has better energy, metal is lighter).

corners - rounded corners make it easier to navigate around the receiver, especially if you happen to like keeping a hand on the receiver

face cradle - makes lying on one's belly much more comfortable; adjustable models are available and have the advantage of more options for comfort.

bolsters - in my experience most receivers are more comfortable with a bolster (6-inch or 3-inch) under the knees while lying on their back and/or under their ankles while lying on their belly. Also, I've found the 3-inch bolster to be perfect under the neck of women with the rounded back associated with early osteoporosis.

extra padding is available - can make getting on and off the table more comfortable and can make a difference to overweight receivers.

carts are available for moving table from place to place.

flannel sheets and face cradle covers are available and can add significant comfort.