I picked it up fairly quickly, having no previous experience with welding. It is strong enough (if you get it right) with good penetration. I liked the fact that it is gas-less as I'm only going to use it for my own DIY jobs. If it were a garage then the better gas welders would make sense. Welding thick metal is actually quite easy and you can run a seam weld with just a bit of practice. Thin metal takes much more concentration. It is very easy to blow through the metal. I'm repairing my 1981 Datsun right now...they were made of tissue paper to start with and 45 years of English weather hasn't helped

Lots of short tack welds gradually becoming linked up and ground back. Also, the welding masks they sell for quite a reasonable amount are very good and react instantly to the arc, going clear as soon as you stop...so you can see what you're doing.
Make sure you have clean metal with all paint ground off. Check you're not setting fire to anything and have an extinguisher to hand. Play around with some scrap first until you get used to the settings and wire speed. This welder is an entry level model and there are much better ones out there...but it works for me.