Is This South End 1-BR on Shawmut Ave. Worth the Climb?

The 1-BR, 1-BA Unit 5 of the busy, busy South End's 439 Shawmut Avenue is on the top floor. And! It comes with a top floor of its own: an office-slash-bedroom-slash-hangout-slash-storage-space above the living room accessible only by ladder. Kinda neat, no? The 781-square-footer, loft and all, hit the sales market on Wednesday. The spread wants $599,000. Thoughts?
· The 11 Projects Transforming Boston's South End Forever [Curbed Boston]