I liked it.
1.5 oz Bourbon
1.0 oz sweet vermouth (dolin)
1 bar spoon marmalade (homemade)
2 dash Orange Bitters

Loved this. We use a blended American Whiskey as I find Bourbon a bit too sweet. The resulting cocktail had a wonderful hint of orange with just the right amount of sweetness. Perfect for before dinner. Spirit forward and very easy to drink.

Tried this as written, but I prefer a sweeter Manhattan. I upped the vermouth by around 10ml and much preferred it that way. I used Frank Cooper’s Oxford Marmalade. It took a long time to dissolve in the bourbon but gave a good flavour.