I watched it and thought Matthew did a really good job. Very entertaining.
Solo riffs are tough, and he could use another riffer to play off of, and there was sometimes too much space between riffs. It's a catch 22 with solo riffs since if the riffer delivers riffs every 5 to 10 seconds, he sounds schizophrenic, but if he doesn't, then it feels there is too much dead time.
But all in all it was a great effort and I really liked it! I will be buying House of Wax.