We've got about 30 of the GXP2130s in our office. They work quite alright
now, but before the latest firmware update 1.0.4.23 we had some weird
issues, like ringing on the line after initiating a 3-way call. Anyway this
firmware is solid and their support was very responsive in troubleshooting.
Sound quality is good. Web config is good. Grandstream wouldn't set us up
as a partner even though we are an IT shop, too bad because it would have
been useful.
Haven't used much YeaLink stuff, but curious to try.