I didn't like the episode very much. It felt very forced and clunky, in terms of editing and storytelling.
"Run, Barry. Run."
"Nah, I'm good. I'm just going to stand here and wait for Iris to pick me up."
"Okay, cool."
I wish they had cut the zombie stuff entirely (even if it means sacrificing Cisco's "fo'real?" line, which was great). Instead they should've shorten the Matrix part, bring him back earlier and actually show how it changed him (if it actually did anything). But the constant back and forth between the cartoon meta zombie and Barry getting over his mother's death (again!) every 5 minutes was so tedious. It wasn't even a plot point this season (for a good reason), but all of the sudden it's the reason why Barry sucks at being fast? I'm not buying that at all.
And then there was so much other dumb stuff, like Iris luring the zombie from their house all the way back to STAR Labs. Like, are you serious? Is it around the corner or what?
I don't know, maybe I wasn't in the right mood for the show, but this episode bothered me a lot.