Been using The Real PBX's toll-free numbers for a while now and had absolutely no problems thus far. The initial setup was, however, an inconvenience, nut that is to be expected. Otherwise, their service is on par, if not better than the rest. Call quality is awesome and the back-end provided by them is also very easy to use, for laymen as well.
Overall as a client, very satisfied with their cost-effective toll-free number service.