I purchased a Skulltronix skull about 5 years ago. The only problem I have had with it was do to my own stupidity. I was setting it up in the dark and I plugged it into the power cord for my laptop instead of its transformer. I shipped it back and it was quickly repaired for a nominal fee since it was my error. I don't use it that often, but it works just fine.
Some things to consider: 1) You will need a PC connected to the skull to run the routines unless you purchase a RAPU; 2) If you want to loop several routines you will need the Helmsman software; 3) If you want to create your own routines you should consider the Live Action package or read up on VSA software (you cannot just add audio to animated the skull, it must be programmed); 4) You will need to mount the skull to the neck rod of a bucky skeleton with a lock washer (or make your own base with a similar rod); 5) The skulls may have a stain applied, so if you are using a bucky you might want to apply a similar color stain, so ask what color.
I usually use mine attached to a bucky on a skeleton stand with a party speaker with a mic stand in front of it. I put the speaker on top of a milk crate where I hide the laptop and tie the bucky's hands to the mic. He looks like a total rock star! Before I set up the bucky, I found a tape cassette carousel at Goodwill and turned it into a base.
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