Quote from Richard Arschmann »MTGsalvation provides a vastly superior quality of discussion and is a better forum for pro input.
Most of the upper level grinders and lower level pros that I know on the west coast (myself included) would say the exact opposite. MTGsal is pretty well regarded as having a remarkably low quality of competitive discussion, and most only read on here to find out what's going to be getting played in rounds 1-3. The only place I know of that's held in lower esteem is the general forums on Tappedout.
Contrast that with r/magictcg, where truly terrible posts get downvoted to the point of being unseen, and name pros actually chime in and contribute to discussion, not to mention official WoTC and store reps. Contrast that with a site that's amazingly slow and is blocked on many business and professional firewalls, and that's pretty much that. Obviously there's issues in other places too, but MTGSal views many of its deficiencies as strengths and has remained static or regressed since getting sold to Curse.