I am missing a setting on Tripadvisor. Sake is neither average nor very good. Above all, it is consistent which is a rare find in Panama. Most restaurants are horribly inconsistent and Sake has managed to deliver a consistent quality of food over the last few visits.
The sushi is definitely the best in Panama without a shadow of a doubt. Do not try to eat sushi anywhere else. However, it is not great for someone that has previously lived in Asia. It is just acceptable.
The main courses are pretty good and I prefer them over the sushi any day.
The two things that are somewhat off-putting are the poor service (bring plenty of time when going for a business lunch) and the smell left on your clothing when you leave. It is a mixture of cheap air freshener and fat.
If you own or manage Sake, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.