I still really like the flic buttons, but our household is unusual in that the buttons have to be dog – friendly so my service dog can use them also. The flic is a nice soft rubbery button, so he likes those. Although his new favorite is the harmony pop buttons which are much bigger. 
There are quite a few button-type devices now, some wall mountable, some for tabletop or handheld. See the following list (this is a clickable link):