Granted I already knew about this, but Bulma being the mom was kinda obvious based on Trunks interaction with her and the Capsule Corps thing but I still enjoyed the reveal. I particularly liked that Goku figured it out before Trunks said it from her building the time machine, and the whole story of how she and Vegeta got together was funny. With Yamcha not being faithful, and Goku going "Actually I don't".
The info-dump was really good to, with the Androids, tying things back into the Red Ribbon Army, and the heart virus (I like that this was the point they made it clear Piccolo could hear), it's all a really good set-up for the next arc, and good incentive to training. I like that the last description of Vegeta was lonely, and Piccolo's conversation with Goku afterwards was nice. Also liked Goku being upset about the Heart Virus because he wouldn't have gotten to fight them. Off to a great start.