תרגום - טורקית-אנגלית - Sana bir yararımın olması güzel bir ÅŸey.

Translation is okay and I can vote for it, but althoug 'güzel' means 'beautiful', isn't it better to say '...is good thing' or '..is (so) nice'?

That sounds better in English if the meaning does not change...

"Being useful to you is nice." can be.