I just tried out my T-motor 1448's this weekend too. The inspire does seem more responsive with these blades. They are a bit quieter, especially when the brakes engage violently when you switch directions or let go of the stick.
What I noticed was that it accelerated faster. It used to take me quite a while to crawl up to 20m/s, now I can get to 22m/s in half the time it used to take me to get to 20m/s. I am using the dronehi.re adapters, as I found the Lynh Pham adapters a bit overpriced for a little pieces of CNC'd aluminum. If you do make the switch, whatever adapter you want to use (there are some ones made by stein-elektronik.de that are nice and work as well), just keep the threads clean and snug them on. I found all four props almost difficult to get off after just 6 minutes of flight.
Is it totally 100% worth it over the stock props? No way, the difference is definitely there but it's not really life-changing, for example I couldn't agree that it makes the inspire "more stable" than the stock props do, maybe only because it's quieter in strong winds and doesn't sound like a bee's nest being tumbled in a washing machine. I find it adds to prep and take-down time because the stock DJI's are much faster and easier to install and remove. It's way more expensive than the stock props, you could buy so many stock props for the price of one of the T motor ones. That being said, I do like them and will keep using them. Maybe if the adapters and the CF props didn't cost so much it would be a no-brainer but at these prices, I would think twice.