Using Mind Vision grants the Mind Vision buff to both the target and the casting priest.
Mind Vision cannot be dispelled, neither by friends nor by enemies, except by invulnerabilities such as Divine Shield or Ice Block.
Can be used on any target, including players, mobs, NPCs, pets and non-combat companions.
Mind Vision has unlimited range, and does not require line of sight.
Players can therefore use /target to select otherwise unselectable targets and use Mind Vision on them.
Can also be "chain-cast" from target to target to potentially scout instances for rare mobs/patrols, or allow you to find a distant target.
Mind Vision cannot be used on targets in another instance or on another continent.
Although Mind Vision has a 1-minute duration, it can be recast at any time, extending its duration indefinitely.
A mind-visioned rogue or druid who stealths can still be seen. However, [Vanish] and [Cloak of Shadows] will cancel Mind Vision.
Casting any spell will cancel Mind Vision. Taking actions or using items will also cancel the channel.
Unlike most channeled spells, priests channeling Mind Vision cannot move, turn or jump. In order to cancel the effect, the player can press the Escape key, or right-click the buff.
It is possible to cast a single instant spell on the target before the effect is cancelled. This can be used to allow priests to attack stealthed targets, by using Mind Vision on them before they stealth. When used on stealthed enemy targets, any non-instant spell will interrupt Mind Vision before the cast can be completed, cancelling the effect and therefore causing a loss of the target. Any spells cast during Mind Vision must still be on a target that is eligible, within range and in line of sight of the priest.
As with most spells, it is not possible to cast Mind Vision on a target that is currently duelling. However, it is possible to cast Mind Vision on a target before it begins a duel - the effect will not be cancelled when the duel begins.
Mind Vision is prone to frequent errors, especially when chain-casting Mind Vision on targets out of the priest's line of sight. In these cases although the cast channels successfully, the vision is returned to the casting priest, giving the impression that the target is using Mind Vision on the priest. The Mind Vision buffs are correctly granted, and the priest is still unable to move until the channel is cancelled or expires. This also often happens when a target moves beyond a certain range.
Mind Vision can be enormously powerful in Warsong Gulch, as the flag carrier can easily be targeted via /target <name> and then function as the target for the spell.
When defending a node in Arathi Basin you can Mind Vision an incoming rogue or druid before they stealth, then pop them out with [Shadow Word: Pain] once they come into range.
It can be used to annoy other people, as it cannot be dispelled.
As a consequence of this ability remaining 'glitched' (with instant-cast spells working on your target while channeling Mind Vision) it is possible to chain-cast Mind Vision between multiple mobs/players. Useful for maintaining the watch on the flag in Warsong Gulch, or third-person scouting in raid encounters.
Combined with the warlock's Eye of Kilrogg this can prove useful for allowing multiple players to scout the same region.
Use /target to target a known PvP player nearby, then use mind vision to determine exactly where they are. Similar, when trying to find a certain mob character for a quest, use /target to target them and then mind vision to locate them. Targets will also show up on your mini-map if within range, without need for Mind Vision.
[Vanish] and 
[Cloak of Shadows] will cancel Mind Vision.
[Shadow Word: Pain] once they come into range.
