I have two accounts (one for me and one for in-laws). We live a mile away, same ISP (time warner); pretty much same everything. My service works for 8 months without any problems (I used supplied adapter for a few months to make sure that the service was good. Once I was comfortable, I switched to BYOD - first old Sipura, and now OBiHai). Never had a need to call support. Wrote a review for DSLR. I was very happy with it and convince my in-laws to switch to VOIPo as well.

My in-laws have constant problems. With BYOD adapter voice quality is just terrible. Once I switched to provided adapter, it is good for a few days, then it's bad. I called support twice; they tweaked something - and the quality improved for a week or two but then it's bad again. I know it's not ISP (even if they weren't able to fix it) - they have another adapter on the network, that they use for international calls (with Call With Us). For troubleshooting, I also set up an IPKall to this adapter. So, whenever voice quality is bad on VOIPo line, first thing I check is to call their other phone - and invariably, it sounds much better there.

Unfortunately, they don't speak English, and in order to troubleshoot with Voipo support I need to be in their house during business hours, which is not always possible. So, often by the time I am ready to call support, the problem goes away. However, the reliability is just not there.