I bought this when released after it had been postponed a year or so. I was so thrilled that this component switch looked kinda like my 360 - and there weren't many on the market at that time.
I bought it for around 120£ in Denmark - and I was had, had I tell's ya. Let me tell you why.
When in standby the display light is faintly glowing. Hugely annoying.
White colours simply scrambles the picture. I did try connecting the consoles directly to my tv, trying to recreate the picturescrambling - but no - it was this 120£ 540c thingie - yes I even tried with new expensive cables.
I tried contacting Joytech support, but I never received an answer. Naturally I'm all done with joytech products.
But don't necessarily take my word for it - At the current asking price of 17.99 you might just go for it, just don't expect a miracle.
Singstar is out of the question - too much white in the picture in some songs.