This song has to be one of the most fun songs I've ever bought for DLC and definitely is one of the funnest Who songs.
That being said, I'll try to be unbiased.
Like most Keith Moon songs, you will be flying across the drum kit, performing rolls across toms, beating cymbals to shreds, and hitting a large number of consistent kick drum notes that pull you along throughout the song. However, one of the best things about this song is that although it is all over the place, its surprisingly smooth and easy to play, making it (as I said), one of the most enjoyable drum tracks. The rolls are fast, yet not too fast to hit, the fills travel across the drum kit, yet are quite simple, and the consistent kicks constantly keep you in time. Sea and Sand is also very diverse so you will likely not get bored of playing any part of the song.
If you like this song, I would recommend it on high priority.
If you like The Who, this is one of the most funnest and enjoyable tracks in the pack, so you should definitely buy it.
If you mainly play drums, this is a MUST HAVE for any drummer, as it is one the most smooth-yet-complicated drum songs.