Purchased this radio in 2006 and have used it almost every day since. The evolution of the software has been absolutely amazing. With each iteration it's like getting a new radio. It takes a certain type of ham to want a radio like this. Even today some hams refuse to get used to a radio that has no knobs. Setting up the radio is quite involved but is totally worth it. The transmit audio is superb. I constantly receive unsolicited compliments on the audio quality. Be advised that this radio will not work with the newest computers as it requires a parallel port and works best with Windows XP. There is a parallel to USB adapter that requires XP or Vista but these are difficult to find. If you come across one with all cables and the required sound card at a good price and you like to tinker and experiment then give it a try. This radio is the most fun of any radio I've owned.
I purchased my SDR-1000 twelve years ago in 2003 just after they were announced. I assembled the pieces, including the 100W transmitter, in the metal box supplied. I use an M-Audio sound card. My computer is currently a Lenovo Pentium 4 desktop running XP. The only difficulty I encountered was RF feedback from the transmitter which I fixed by putting ferrite sleeves around all of the cables. This has been a super radio. Outstanding rejection of adjacent channels through the use of digital "brick wall" filters. The SDR-1000 receiver is very sensitive compared to an ICOM IC-728 or IC-707.
While newer Flex Radios get rid of a lot of cables, I am sticking with my SDR-1000 as it is a great rig despite its age.