I bought the Logitech Slim Combo case together with the Apple Pencil when I got my 10.5” Pro.
Pros: Good protection, sturdy, backlit keyboard, runs via the smart connector and a good set of on-keyboard functions on top row.
Cons: A little bulky when in closed mode, the outer edges of the keyboard gets some abrasion marks when it’s closed, rubbing against the case’s outer edge as there’re no rubber/silicon padding. Small gaps between the iPad itself and the case traps dirt easily.
But overall I’m still very satisfied with the Slim Combo and I use the keyboard quite extensively, even when typing this out.