I have one major need in an iPad keyboard: I need to be able to write wherever I go.

Logitech's made some of my favorite iPad keyboards: the Ultrathin, and the Create, which grew to stay on my 9.7-inch Pro full-time. Maybe, over time, Logitech's new-design Slim Combo case for the new iPad Pro seemed like the thing I needed to use the iPad as a useful laptop alternative. But, right now, after a few days, I'm frustrated. You will be too, if you're looking for a lap-friendly case… because this isn't.

But if you're buying a 12.9-inch iPad Pro, Logitech's new case is great.

How can these both be true? Consider this an iPad Case Study.

The 10.5-inch iPad case has hits and misses

After a week with the Slim Combo on the iPad Pro 10.5, here's the good news: There's a great keyboard. It's backlit, and key travel is perfect. As a typing experience, this is the best keyboard, miles better than Apple's Smart Keyboard Cover. But it's no bigger than before: it's the same exact-sized keyboard that's on the Create 9.7 Pro case, with thicker sides.