Very natural feeling addition to the game, my Dad & I enjoyed it (his only complaint was the lack of the tongue attack, but he enjoyed the mod nonetheless).
Bugs:
* Sometimes when dismounting (crouch launching off) a Yoshi in multiplayer the Yoshi will stick to your player model for other people, it'll be in the spot where you left it for you, but they can't see it there. (in other words they see you wearing the Yoshi like an inflatable costume, & you see the Yoshi parked, but the Yoshi is completely gone {or maybe invisible?} for them).
* Sometimes the Yoshi won't change color for other players (those who aren't the one riding it) so you'd see your colors (or default colors?) on someone else's Yoshi at times.