I received an 80 Gb I-pod for Christmas and am very pleased with the item. The scroll function operates as it should--only a little sensitive. The storage size is appropriate for a large music collection (Mine is nowhere near the 80 Gb, so there is plenty of room for video, pictures, and games.). The earbuds that come in the package work and sound just fine.
The only problem I have is the right earbud falls out from time to time while running. Also if running with an armband, you will notice an oscillation in sound from time to time that is in cadence with your armswing. I recommend a FM Tuner or Tape adapter for car stereos.
The size is just fine, despite being one of the bigger models. The weight is also very appropriate, especially for running. Overall, very pleased.