Never got why people have such distaste for that level. It's certainly not the pinnacle of any of the campaigns, but it's also fairly short and they give you plenty of weapons to burn through the Flood.
Flood levels are boring.
ODST and Reach were so much better for not having the previously obligatory Flood levels. Even Wars had 'em, and they had the same "remember that fun you were having? Time to stop for a bit" effect.