i use iris, it's ok, simple enough to use. check out their website tho, cos when I registered on-line they provided a specific number relevant only to the software package bought by the registered user.
If you are going to take Gary up on his offer, I would check with Iris how easy it is to transfer the package over to your business. I had a glitch right at the beginning when my business was registered to Iris at Done and Dusted, when in fact the correct name is Don 'n' Dusted. The procedure to change just that one little bit from and to 'n' was a nightmare as I was told I would have to have a new software package with a new number. I didn't bother in the end and just carried on using Done and Dusted!
I think it cost me £180 odd.
Jan