Agassiz Rock lies besides Blackford Quarry in Edinburgh and provides accessible moderate-hard bouldering in the city. The outcrop is south facing allowing climbing all year around.
A definitive guide now exists and is available at - https://gum.co/OXUHc
The rock is steep in some parts, staying dry in the rain. The overhangs and crack are affected by seepage after heavy rain though.
The left side of the crag gives fairly stable climbing, however the right can be loose in places (expect for the black slab at the extreme right).
The climbing is mostly eliminate style problems and so there great scope for setting your own.
Some videos are available here.
No problems with access. From Edinburgh head to Blackford hill. The quarry can be found on the south side besides Blackford Glen.
Park either in the Edinburgh Observatory car park, on Braid Hills drive or on Blackford Glen Road - park in designated areas, don't block the access to the farms and to Edinburgh Council waste centre.