I’m on an iPad Pro 12.9” Gen 3.
On my previous iPad Pro, I used the Smart Keyboard which was good to use (if a little cramped) with it’s great downfall (especially for the price) being that the Connector would fail and one one Smart Keyboard the glue on one side failed. Apple replaced the Smart Keyboard twice though (once outside warranty)
For this reason I was reluctant to drop £200 on a new Keyboard Folio, so after recommendations from Myke Hurley and Jason Snell, I put down my money for a Brydge Keyboard (with a reduction of £30) and I think it’s wonderful. Yes it’s heavier than the Apple keyboards, but it’s also backlit and it’s easy to take your ipad out of it.
I would recommend it to anyone unless the weight would be a particular issue for you.