Return of the Jedi
Empire Strikes Back
Revenge of the Sith
New Hope
Phantom Menace
The Force Awakens
Attack of the Clones

This is my personal ranking! A lot of parallels between A New Hope and The Force Awakens though.
1. Empire Strikes Back
2. Return of the Jedi
3. A New Hope
4. The Force Awakens
5. Revenge of the Sith
6. Attack of the Clones
7. The Pantom Menace

5, 4, 6, 7, 3, 2, 1

But why is the movie considered good, especially today?

4,7,3,5,6,1,2

1. Force Awakens

With the exception of Kylo Ren and The Leader of First Order, everything else was better than the prequels and originals for me.

Better effects, better fighting, better acting, no Jar Jar, Implicit Jar Jar murder, kylo ren was actually good till he removed the mask, better protagonists

: (

That drops it in between 3 and 4 for me.

Still a bit unsure where The Force Awakens lands. It was better than any of the prequels, but how it compares with the original trilogy is a different story.

1. Empire Strikes Back. Still the best in the series, strongest story, best character progression and many of the most memorable scenes.
2.-4. A New Hope, Return of the Jedi, The Force Awakens. Similar in many ways, very strong in most aspects, but each has their own, different weaknesses.
5. Revenge of the Sith. Best of the prequels. Still contains a lot of what made the first two bad, but has much more good in it compared to Phantom and Clones.
6. Attack of the Clones. A few good things, but also contains easily the worst acting and dialogue in the entire series. The only ones who come out ahead in this movie is Palpatine and Obi-Wan, and only because of the talent of the actors in question.
7. Phantom Menace. Just mediocre all around. The soundtrack, the final fight with Darth Maul, and a few nice scenes are the only good things in it. Clones has worse stuff in it, but it also has some better staff, so it just barely comes out better than Phantom.

I have seen it yesterday. I will see at again soon, pretty sure. The funny thing is, even though I like Ep1 the least easily, I went to see it in theatres a total of 6 times (5 times originally, once in 3D a couple years ago). So yeah I'll go see it again at least twice more probably. I loved it, even though it played it safe with the plot, I get why it did. Liked the new characters; Rey, Finn, Kylo Ren, Poe, the perfect new droid BB-8, lot's of potential and Harrison Ford was amazing! He nailed it.

So yeah, I'm not sure yet how it'll fit in compared to the original trilogy because it needs some time to settle, but at least I'd say it was better than any prequel. I loved Revenge of the Sith as well though, considered it above Return of the Jedi for the longest time until I saw them again recently. I'd put Sith, the new film and Jedi in the middle category:

1: A New Hope
2: The Empire Strikes Back
--
3: Return of the Jedi
4: The Force Awakens
5: Revenge of the Sith
--
6: Attack of the Clones
7: The Phantom Menace

You won't find me defending "Episode I" very often, but the CGI "overload" didn't really begin until AOTC. "Phantom Menace" still had a number of good practical effects.