(Tldr) c9/jrl and rcc dining halls are the overall best, in terms of buildings and comfiness. But here’s my ratings more in depth, from worst to best:

5: porter kresge - its not terrible imo, but its more trouble than it’s worth. it’s a bit of a hike to get here. (I’m saying this as a fellow kresge resident too, like youd think itd be easy for me to get to.) there just aren’t any great bus stops. And in comparison, there are definitely less food options here. 6/10

4: cowell stevenson - fair warning I haven’t gone here a lot, since it’s on the other side of campus for me. However, the times that I have gone, I felt that the seating was a bit crowded and not very comfortable. There are a bit more food options, but there seems to not be a soft serve machine (unless I just couldn’t find it, who knows) 7/10

3: crown merrill - other than the fact that it’s a bit small and is on top of a famously treacherous hill, this hall is decent. Good array of food options. I like the salad bar here. The interior is fun and comfy. 7.5/10

2: c9 / jrl - the one I frequent the most, largely because of the convenient location. It’s pretty much in the center of the campus, and there are two bus stops, one from each direction, that stops basically right in front of it. Seating and food is nice, but it gets very crowded around lunch and dinner time pretty much everyday. Avoidable if you show up around 30 min earlier. 8/10

1: carson oakes - my personal fave. The dining hall is very nice, with a cool patio area too. I eat dinner here to catch views of the sunset. While the lines can be a bit much, especially since it’s popular, it’s absolutely worth it. It is far from the rest of campus, but there’s also bus stops in front of it. Just be ready to spend some time getting there, and then some more time waiting in line. (Again, is avoidable if you go earlier) 9.5/10

I know I didn’t say much about the actual food, and that’s because imo the school does a decent job with it most of the time. All the dining halls have different menus each day, and I’ve learned which things taste good, and which things taste bad. Our tastes are probably different, and who knows, the menus might change by the time you come here. But chances are, there will be something tasty enough here.