This is one series that I hold dearly to my heart, but it doesn't mean I would be bias. First off, time to knock down somethings other users has complained:

"It's unrealistic that Tohru was the "angel" that saved everyone from their traumas/abusive past"
First off, lets explain how Tohru wasn't really the "angel who saved everyone. Everyone saved themselves. They learned to grow by mostly themselves with some influence from Tohru. They learned from others like Machi and people in their families as well. While Tohru does play a big role in influencing the change of the Sohmas/Soumas, she wasn't the carrier of the change. I do agree with, however, that is what unrealistic to a degree. Then again, this is a FREAKING MANGA series; there are very few series that are actually comepletely realistic especially in Shoujos, Slice of Life, etc. even series based on history.

"Tohru is a mary sue... she's little Miss Perfect"
Honestly, while Tohru is your typical nice girl, she still has her flaws. Ever heard of being too selfless it's selfish. That's what she is. She also still envies other characters and recognizes her faults like being weak. Also, she did not leave to live with her grandfather because her relatives hated her. She left because the were renovating the house, and she felt like a burden for staying in a relatively small area that's meant to house her aunt, uncle, cousin, and grandfather while the house is renovated.

"Some of the relationships are creepy, and the ending was a bit rushed"
I do agree that the ending was pretty rushed; however, it was still pretty satisfying in my opinion. The relationships, I partially disagree with, but the build to the relationships were overall pretty developed. The largest age gap we know for sure is with Saki and Kyo's father figure (I forgot his name). Even so, Saki is of age, and the oldest possible age for him is like the thirties. Plus, it's pretty common in Japan.

"The way they handled and abuse was unrealistic and inferiating"
As someone who has experienced abuse and trauma, this was well written for it's time. The cause and effects were pretty realistic. The characters didn't excuse any of Akito's actions, Rin for example, but it doen't mean she should be completely miserable for her entire life. Her mom did get her comeuppance. Everyone still struggles with their trauma, but they've matured to handle it.

"The art is trash"
Okay... now that's really unnecessary. Again, for it's time, it's pretty good. Definitely not as detailed as many other shoujos of it's time, but it's still beautiful. Plus, this was one of Natsuki Takaya's first work, which is amazing on the popularity it got for one of her firsts. I love how Takaya has grown since Fruits Baskets.

"The story was basic"
I would agree to a degree once again. It does have the typical nice girl and tsundere bad boy, but it still doens't entirely fit in the mold. It was somewhat revolutionary at it's time for a shoujo series to include trauma and abuse in the way Fruits Baskets has, even today it's still significant for conservative Japan, that rarely talks about mental health, abuse, trauma, etc.

Now that we got that out of the way. I'm going to say the rest of my review. The characters were enjoyable. Sure there are some cliches, but most were tolerable and/or well done. The ending was expected yet still enjoyable. There's a reason why Fruits Baskets is a shoujo classic. I would still recommend this to summon.