*hands mutenroshi a Kamehameha cannon to fire at the screen*
So I've seen it last night. And it was not as bas as it initially looked. But make no mistake, it's still veeeeeery average.
Spoilers ahead...
Positive points:
Numero Uno in my book: Master Roshi grabbing Bulma's ass! Twice! Check!
Bikini magazines. Check!
Goku's naivety/almost-retardness. Check!
Piccolo's soldiers are spawned from his DNA. No eggs, though.
Goku's meals!
Hints at Namekans, Goku's alien origin and Bruts wave.
Negative points:
Condensing the 17 first issues of
Dragonball into a one week period is kinda dumb. Goku has no proper training.
Everything seemed rushed (i.e. Bulma/Yamcha, the hunt for the Dragon Balls).
Goku is not responsible for Gohan's death. Piccolo is.
No tail!
An 8 foot tall Ozaru!

A ridiculous Shenron! I expected something huger!
The fight between Piccolo and Goku lasts 2 minutes.
There is a lot of plot holes or cuts (the movie is very short!)
Anyway, the movie remains watchable if you don't pay attention to its narrative flaws, or short-cuts. It's definitely kid-friendly.
C+