I cannot tolerate the Smart Keyboard, I just find it too fiddly and poor value for money. Just personal, I guess, but it’s also got virtually no key travel.
I went with a Magic Keyboard with Canopy cover by Studio Neat. The keyboard I picked up for just £45 on eBay, boxed and like new. The cover was $40. Looks great and only needed when required. The rest of the time, I use the iPad Pro with a Saddle Brown leather smart cover and back skin by Dbrand.
I also had a Logitech slim combo which was excellent for typing but added a fair bit of bulk and weight. For that reason, it just defeated the purpose of an iPad for me. If you only need an occasional keyboard and don’t want to spend a fortune, consider the Logitech Keys to Go or K380.