I can totally agree with that statement. My iPad Pro has handled everything I have thrown at it with ease! Mind you I am a simple user; web surfing, fantasy football, trip planning, video streaming, some document editing, and an occasional game (yet to fully test Rome Total War).
The screen is beautiful! Sound is clear and loud. No lag on anything (except for maybe what is caused by my wireless connection).
Again, I agree with kipwheeler, it has changed my life. I picked mine up as a refurb from Apple, have no regrets, and I am actually blown away by how awesome it has been! I fully recommend getting one. I will use mine until it stops working or I die.
For a bit more detail on how it changed my life, the real blessing was grading student essays and using the iPad in class-room teaching. I started having my students submit their literature and linguistics papers as PDF files, which I could mark up, highlight, and "stamp" with preset markings in the iPad, then return electronically with the touch of a button. Every student essay was automatically alphabetized and stored on the iPad or located with a search command. Suddenly, those 80 student essays I received every three weeks, which used to pile up in thick piles on my desk? They evaporated.
Even better, since I kept copies of earlier papers in dropbox, when students came in for appointments, I could easily pull up everything they had previously written and note trends in their writing to discuss with them. It made it very easy to see when a student wasn't "getting it" in a particular area of composition, and I could then pull up old essays to show examples to them across time.
Additionally, the ability to draw on the iPad and link it to a smartboard meant I could write or draw or graph on my iPad and project it before the classroom each day--way better than the crummy sensors on the smartboard itself. I could even save the board drawings as screenshots and forward them to the entire class at the end of each lecture.
Aside from work, having the apple pencil available re-ignited in me my love of art and drawing. Decades ago, I was an art major in college, but went a different way in graduate school. I had not done serious drawing or sketching in probably 15 years. The ease of doing it on the iPad, however, reinspired me to take up that beloved craft.
In terms of entertainment, I play a lot of D&D with family and friends. All the D&D charts and books available as PDF files could be stored, transported, and accessed easily on the iPad, reducing clutter. Filemaker Pro's database creation really comes into its own when you pair it with Filemaker Go on an iPad, and make a database of your characters and monstrous encounters--including snapshots of the monster images in the various databases. The iPad even became my dice replacement with the Dicenomicon app.
Mind you, now that apple pencil-support is moving to other iPads beside the Pro model, the uniqueness of the 10.5 vs. other sizes like the old 9.7 isn't as pronounced. Still, I've found mine to be a wonderful device, worth every penny.