I disagree with the previous review of this episode, I thought it was a good one.
One of the aims of this spin-off was to flesh out the character of Joey, and allow viewers to learn a bit more about his past, and this episode does that. The sight of a younger Joey was pretty funny too.
I like the character of Zach, I think he brings something different to the show, and although it significantly cuts down the Joey/Michael interaction (Michael again is largely side-lined here) the dynamic between him and Joey is fun.
It's nice again to see Gina/Bobbie/Alex in a story together, and although the attempt to humanise Bobbie a little falls flat, there are some nice moments in the story overall.
Another good episode of the show in my opinion.