So far, so good with our 2 8810s. We also have 2 BD10Ks, and the Extremeware XOS has been great...hitless upgrades is a blessing. Some techs would have liked web access for XOS, but the command line is fine IMO. I'm kinda "so-so" with Extreme and/or Avaya's support, but we really haven't had much need for service calls anyway! Now, EpiCenter is a different story...