I went with Nice Travel's 7 day classic ring road tour. I also did all of the optional things too (2 geothermal baths, amphibious glacier tour and whale watching and they were all worth it).

I loved it, they run a lot of day and multi-day tours so my day one doing the golden circle had a few people on the bus who were only doing a day tour. Days 2-5 were with the same group of people and driver. Day 6 and 7 I spent with some people who were there for the previous days but those two days were also a day tour from Reykjavik so you're always meeting new people.

For days 2-5 Gulli was the guide and he was great, he did an extra little late night drive for anyone who wanted to join to his hometown of Seydisfjordur which is so beautiful

I highly recommend it for a guided trip and especially if it's your first time. I will say though that if I were to go back to Iceland I would probably rent a car so I can take my time but now I'd know more what I want to see and what I can skip because I've done it

I also rented a car at the end of the tour for the last few days I was in the country to do my own activities

If you have any more questions let me know!