I have the Chicago electric 90 amp flux wire welder that I think HF sells. (we don't have HF in canada but I'm 99% sure its the same welder) For welding up tubing and exhaust systems its alright but don't plan on doing any nice body work with it. I did a patch on my old ford f250 last year and while it did weld it in, I burned through a number of times with it and none were particularly clean looking welds. If you want to do any sort of nice body work I'd suggest you get a MIG or a tig welder.

Also, if your a beginner, using a cheap welder is extremely frustrating. I learned on a big industrial miller stick welder at work that practically felt like it welded for you. Nice smooth beads, you just had to think about it and it would strike an ark. Until I bought the flux core welder I had never used a wire feed unit and I think that had I not already been a decent welder I would have found the 90 amp flux core to be a challenge.

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2004 F150 4.6L -My Daily
2007 Volvo XC70 -Wife's Daily
1998 Ford F150 -Rear ended
1989 J-spec 420SEL -passed onto its new keeper
1982 BMW 733i -fixed and traded for the 420SEL
2003 Volvo V70 5 Speed -scrapped
1997 E290 Turbo Diesel Wagon -traded for above
1992 BMW 525i -traded in
1990 Silver 300TE -hated the M103
1985 Grey 380SE Diesel Conversion, 2.47 rear end, ABS -Sold, really should have kept this one
1979 Silver 300D "The Silver Slug" -Sold