Ice cream is okay, it's mixed with their ingredients freshly so when you get the ice cream it's very smooth. The ingredient options are very plentiful so if you're looking for fun mixing options to pick from this is the place you're looking for.
The menu could be simpler, and for this reason Marble Slab doesn't convey their system well. You're supposed to choose what ice cream flavor you want and which toppings you want mixed in, but I couldn't find that information even though I looked at their many signs/menus for longer than a few minutes.
The staff were a bit depressed and not entirely helpful, though I partially blame myself as I didn't understand this ice cream chains system and assumed some things wrong.
They need to revamp the menu with clearer instructions, I don't particularly like squishy ice cream and the staff could be more helpful, so 2/5 stars.
Note that it's still quite tasty! Would still recommend trying if you're walking by.