Ivan, I have this exact welder with the mig conversion.
Pros:
Extremely easy to weld with.
Very reliable. (never have had a feed jam after welding 10 spools of wire.)
Can use 10lb spools for flux core wire.
Easily converts to mig / flux core.
110v
Price / affordability
Cons:
Need to use flux core when welding thicker metals like 1/8" and 3/16" as it's limited on it's power.
Need to have it plugged in to a 20amp breaker or better (since my garage only has 15 amp circuits, I run a heavy duty extension cord from my laundry room that has a 20 amp breaker)
Duty cycle won't allow you to continuously weld 3/16" for more than about 15 minutes before it pops the internal breaker to allow the unit to cool down.
For the price, you can't beat it. If you were to build a dozen sets of sliders, I would go with a bigger unit. For your basic do it yourself projects it's perfect.
You've seen some of my projects such as my safari rack, front sway bar quick disconnects, 3 sets of rock sliders, an idler arm brace, a jig for my drill press, a welding cart for the welder and have several other projects on my to do list. Mine has been paid for several times over with the labor savings on these projects.
If you haven't done much welding, pick up a welding book and some scrap metal of various thickness to practice prior to diving into a project. Good welds are critical and not knowing what to look for in your welds is only asking for failure of the welds down the road. Thin tubing is much easier to weld with the mig gas, but the thick steel requires the flux core wire. Still easy to weld, just have to chip the welds so they don't come out quite as pretty. (But hell that's what a grinder is for.)
Sorry for all the detail, I'm totally wired on coffee.