What is everyone's experiences on graduated ND filters?

[Hector1970]

Interesting background piece of paper Surapon.
Are trying to break into or break out of Franklin County Detention centre.
You seem to have the blueprints.

I am looking into purchasing some graduated ND filters and it seems like there is quite a variety out there with significant cost differences. I've read about the color changes etc. I wanted to see if there was anyone actually using the various filters that may give their experience. I would be most commonly using them for sunrise/sets or water scenes. I suspect most commonly on my Canon 16-35mm F2.8L II or 24-70mm F2.8L II.

These both have 82 mm filter sizes, so do you need another bracket to go to 77mm?
What filter stop difference is most commonly used 3? 6? 10?
Any other words of wisdom?

Thank you!

Dear friend Mr. Neurorx.
Yes, I try to shoot all of my Photos as best as possible in the Camera, With Minimum Time of Post Processing by Photoshop---Yes, I need a lot of Help from Coklin Creative Filter System ( Made in France).
AND IT's Work great too.
Good luck to you.
Surapon