My thoughts
Wii Sports Resort is fun and worth it - though like the original it has some duds
The first wii sports was fun for the tennis and the bowling. (golf was okay too)
This time around I enjoy in order - swordplay, archery, bowling, Frisbee, table bennis, free-flight airsports, and golf.
Canoeing, cycling, wake boarding, and power cruising are all duds. The rest are okay.
Even so you will still have a lot of fun with this game.
As far as the Motion +
It fills my heart with joy that they will be able to make an awesome zelda game with this tech soon as the swordplay, archery, and boomerang(frisbee) mechanics all work really well.
On the downside you do have to recalibrate the controller before every event, and in a long free flowing adventure game, the develoopers will have to think of clever ways to recalibrate the device without it feeling like you are breaking up game play to wait for the controller. I am a little nervous about this. Hopefully Nintendo will develop another game for this, (unlike with the balance board) to show other developers how it could work in a full fledged game.