We have polycom 335; Digium D40; 1 snom and a Linksys. All of them are pretty easy to configure. By far the Polycom has the best sound quality. the Digium has more bells and whistles than the Polycom but it cannot handle direct sunlight and it sound quality is not as good as Polycom. It has been our experience that if the phone is left in direct sunlight it will lockup. We suspect it is do to overheating. Keep it out of the sun it works fine.