I like it but then we'd be arguing about a heel at the back of the striker instead of a toenail at the front.
If the film is shot at 25 frames per second there is room for error re exactly when the ball left the passer's foot and the body shape of the receiver depends on the position he's moving from and to in order to receive the pass so whilst I think VAR is good for monitoring foul play, I think they should drop it for offside and leave it the ref and linesman to decide - as they do in 99.9% of games.
And if they insist on keeping it they need to improve the tech e.g. short of implants, they could fit the player's socks, shorts or shirts (or a stick on patch on their chest) with a single sensor and let it be decided on which sensor is ahead regardless of arms, legs and big toes - which would work the same as goal line tech and send a signal to the ref's watch - thereby eliminating the need for the video watchers in a different location and the delays.