Frickin massive. Huge achievement. I still doubt its economic viability but an achievement nonetheless.
Just so people can understand the scale here: The Starship booster is 233 ft long, 30 ft wide and has an empty mass of 550,000 lb (probably slight more during the landing because of fuel).
That 233 ft long, 30 ft wide and 550,000 lb object was just falling through the atmosphere at near hypersonic speeds before it had to slowed down, precisely aimed and caught by two robotic arms!
Regardless of what happens with Starship, this catch was an incredible engineering achievement across multiple disciplines. Oh, and they also did that on the first try!!!