Must confess I looked at the slightly bigger brother of this machine on the bay and was tempted like you I have a limited budget and would only use the machine occasionally for the odd project. I telephoned Toolsave for further info, got a sales person who was to get a tech person to ring me back needless to say nobody came back to me. That probably says it all, also if you look at the feedback I cannot find any relating to FEMA welders again to me a warning sign.
So I am still looking and like you asked on this site for advice and became more confused. Have also looked at a S/H BOC/Murex Autolynx 130 and whilst I am told it is working, having spoken to Murex I have found that spares are not available for this machine so again could be left with a pup.
Perhaps what we could do with on this site is a area where people could put their experiences with various welders giving them marks out of 10 1 being crap 10 being the bees knees for various attributes such as build quality, after sales service, reliability etc etc might help people like you and me in making a decision.