Have'nt seen the latest version, but pulled one of these apart a while ago and used it for Moon imaging (V.2 model). Was OK on the Moon and maybe Jupiter, but not really sensitive enough for anything else. The newer models may be better. Takes great moon shots, just used the included software and it worked fine. They will work on USB 1.1, my old lappy did'nt have 2 and it handled it OK.
Had it on the moon when I was in a chat room, people thought it was a movie, were stoked when told it was live from Aus
An 1 1/4" IR filter fits on the front OK after you have removed the lens assembly ( with a little help from some thread tape and sticky tape)
Cheers
Bill