Disclaimer: I'm already a long-time fan of Celldweller, so it's no surprise I'm going to love their (his) live show.
That said, given the genre, I was a bit skeptical about how Klayton would perform. The show features him and Bret (Blue Stahli) sharing the stage. Klayton contributes nearly all the vocals and the two of them share keyboard, guitar and drums duty. The show is very high-energy, nearly continuous in flow and very fun. The venue I saw it at, The Basement, is standing-room only and puts the crowd mere inches from the performers. Klayton interacts with the crowd a bit and generally makes you feel involved.
The quality of the music is very high. Some performers that produce great studio music are... unpleasant on stage; Klaton's music suffers no reduction in quality on stage, but it does change a bit given the sound reinforcement of the venue. Most of what you hear during the show is pre-recorded and the elements performed live are highly affected, but that much should be obvious, given the genre. There is a seamless integration of the two, which I was pleasantly surprised about. In The Basement the bass was satisfyingly gut-churning and that brought a great energy to the music.
The mixes deployed during the show are, as far as I can tell, unique to the show yet still very familiar to fans. In particular, Switchback had a very unique and protracted mix that translated very well to the crowd interaction.
If you're considering this show, you really can't lose. The tickets are a bargain and the music high energy and high quality.