Car rental on Saaremaa

Hi, I found some older topics on this subject but am hoping for experiences from recent travellers. I'm going to Saaremaa in September. I'm wondering what to do about car rental. In one of the older topics I found Omneauto and Onauto, but they don't have information in English. Waiting for their replies by email...

Are there any other options? Also wondering what's preferable: renting a car on the island and taking it to Tallinn afterwards, or sticking to rental on the island and taking the bus back to Tallinn.

Hope someone can help!