The episode was okay. Not great. Not bad. There have been many better, and many a lot worse.
The girl's scene in the bar was just rehashing old territory. Penny centered and predictable. Silly comments from Amy concerning Penny that border on creepy. Bernadette lane changing from pleasant to snarky. Someone commented on how insulting it was for Bernadette to hint that Penny might cheat on Leonard and that Penny should have been insulted. Why? Penny makes no secret of her beliefs that she 'settled' for Leonard, and that he's lucky to have her. Why is it so hard to imagine she might want to spend time with someone she finds more 'her level'?
The gaming scene in 4A was okay. Also fairly derivative. Just a setting for mocking Raj.
The boat scene was fairly enjoyable. Zack is always fun and it appears he found a good match in his wife. Leonard and Penny were very believable and it's completely conceivable that they would be envious of the idiot that hits it big while they continue to work for a living. The idea that Leonard be their donor is not unthinkable. It is also believable that Leonard would be open to considering the idea. That he wouldn't do it if Penny objects is also very much in line with who he is.
Raj and Anu provided some good scenes and some laughs. Kunal plays Raj very well and he was fun to watch in this episode.
As observed below, it might be a dangerous thing to say, but I'll do it. Quite often, Penny sucks. She's terrible. Vain, self-entitled, spoiled, narcissistic, and dismissive of others. Her good qualities are few and they seldom overcome her more abundant negative traits. She thinks the girls are 'lucky' to be her friend. She 'settled' for Leonard. She puts no effort into her marriage. Can't remember her husband's birthday, or their anniversary. She lucked into a good, well paying, job that she doesn't appreciate. She was a bad waitress and didn't care. Penny? Boooooooooooo!!!
Why should she care? She unilaterally decided for both of them that they wouldn't have any children. No discussion. No explanation. Only question that should really matter is whether, or not, Leonard could do it and not expect to have something to do with the resulting offspring. I think he'd have a hard time with that.