Oh, I did raid in both. Hardcore, 3 dedicated nights and a 4th optional night with off-nights dedicated to alts.
I have some great memories from then, but they are more for who I was raiding with, not the content itself.
I saw that Firelands poster Blizz had up at their HQ that made Firelands look 10x as big as it was and was so hyped. What we got was this stupid field of "lava" and rock that was just boring to look at. I think Firelands was indeed, a joke. Sure, the bosses had some neat designs here and there, but overall, the raid was not that fun for me and ultimately I quit WoW a couple months into Firelands. I have videos of raiding footage from then, if you'd like to see it.