Replacing Grandstream GXW4108 with Vega 50 FXO

Is anyone using Vega 50 FXO with FreePBX to connect analog lines ?
One of our customers is having problems with a Grandstream GXW4108 and we are looking for a replacement device (these Grandstream gateways really seem to have reliability problem)

How well do the Vega Gateways perform with FreePBX ? (sound and stability)

Thanks in advance for any feedback.