I have been/go up there a few times scuba diving.
The diving is great, but I haven't toured much of the island, usually berth/board in Lerwick from the Aberdeen ferry and the usual trips up to Brae to Frankies fish & chip place (best on the island?! - it's ok) and of course ----t for photos at the signs, same as one does in Orkney!
Only in summer though so nights never really that long if truly at all.
Nice place.
EDIT
I don't know why it keeps removing the village name, I know it sounds like a rude word, but it's just the name of the village!!!! - It's not even spelt the same!
Here's the location:
View attachment 105906