Great sustain! I don’t know what material it is made of (metal or brass), but it works well. I had to drown it a little into the case (although a lifting plate is included in the kit). The bass guitar is not a specific manufacturer, but was made to order from a good master.
I knew that the bridge was massive, weighted, and I knew its dimensions.
So the inset in the deck was not news to me. I was ready for this.
Plus: Great sustain! Works as stated in the description!
Minus: Not detected. Except that black paint can peel off over time; this will not affect the sound in any way.
I am very pleased that I chose "Schaller 3-D5 B"