I haven't stayed at FFI, but I've stayed at Tropicana several times now.
When looking at Tropicana reviews, remember that they only finished their refurbishments/overhaul in Oct 2017, so anything before that may be about a non-updated room.
The grounds are a basic motel look. Nothing outside that draws you in and makes you think, "WOW! I GOTTA STAY THERE!" but also nothing that makes you think, "YUCK! WE AREN'T EVER STAYING THERE!" They have a small pool and hot tub that is in the parking lot. We have yet to use it, but no real reason why not--just haven't had the opportunity. Room doors open to the parking lot or walkway (no hallway). I travel on my own all the time, and haven't had a problem with this; I just flip over the other little lock when I am in the room, and feel perfectly safe. The grounds are well-lit at night.
We were thrilled with our room since their most recent renovations! Most recently, we stayed in room 371, which is a King room. Overall, I love the updated decor--it felt very stereotypical California--blues, with palm tree silhouettes, and some orange accents. Bed was super comfy--nice and soft, but firm enough to not feel unsupported. The lights on the bathroom mirror was great. Yes, it sounds weird to love a mirror in a bathroom, but it was nice and bright, without being overpowering, and went all around the mirror so it didn't give me "shadows" when doing my makeup. In the case of this specific room, it was on the 3rd floor, had a vaulted ceiling, and windows on both the north and west sides, so our grandson could watch the fireworks when we weren't in the parks. The carpet was fairly new, and passed our white-sock test easily.
While we were there, I felt like the housekeeping was a little spotty--the coffee carafe wasn't emptied a few times, no fresh coffee pods once or twice. They took our grandson's top sheet one day, so he had to sleep with just a lower sheet and blanket for the last couple of days (to be fair, though, he had eaten his chocolate-covered Hostess donuts, and wiped his hands on the sheets; at home, we wouldn't have even thought twice about keeping them on his bed, but I could understand housekeeping thinking maybe it was something yucky, and took the sheet away, forgetting to bring a new one. Overall though, those are small things, and nothing that would stop us from staying again.
Staff has always been good to our family. Check-in and check-out are quick and easy. I had one issue with the parking attendants on 2 trips (specifically, them greeting me by name and asking how room number xx was working for me two separate stays when I didn't have a car, when I was on a solo trip) which kind of creeped me out. When we stayed this last June, though, I didn't have this experience. I call for my own taxi/uber/lyft; the first time I had them call for me, I ended up with a service that cost about $20 more than a taxi, and went 90 mph on the freeway.
Tropicana is definitely at the top of our list now.