If you love puns, well then he's good at them and there is lots of them. If you hate them, he isn't going to change your mind.
The quality of the jokes ranges wildly, which is an inherent issue with this format of comedy. The gags that work best take the longest amount of time to set up, usually because they follow a feedline then punchline format. But shorter jokes suffer from thin premises and tenuous connections. They do run well together but there is no theme or idea underpinning the show, which can often create a love or loathe scenario for the average comedy fan.
Walsh uses a mixture of visual and audio effects, which is novel and certainly helps sustain a feeling of energy throughout the show. The sections that work the best break from his usual formula and are often a silly idea involving an accent or impression.
Sporadically he will ask for a topic from an audience member. This is a nice idea but for the performance that I saw there wasn't a knockout joke and unfortunately nobody tried to tip him up with a difficult suggestion. However, he does not seem comfortable with interacting with the audience in this way.
There's not much else to be said about the show. If you love puns, well then he's good at them and there is lots of them. If you hate them, he isn't going to change your mind.