I've used it for Russian, and it's good. Russian is such a bloody awful language to learn though.

Good for you. I can't stand it when people say "This is America. Speak English." I respond ,"Last time I checked this was a free country. Speak any language you like." And then there is, "Learn another language or are you too afraid of arrest." Gets 'em every time. Learning Spanish is easy. & people love it if you try & speak some. Read the bi lingual signs everywhere to add to your vocabulary.

I started using it recently to learn Portuguese. It's pretty cool I think. I speak English and Spanish. But where I live there is a large brazilian community and I would like to talk to some of the neighbors.

I downloaded Duolingo so the small humans and I can learn Spanish, when going outside to play is not doable.
I'll let you know how it goes.
I have a feeling that the 5 year old is going to do better at it than anyone.

My favorite is Pimsleur audio instruction, but they're expensive. I'm using Duolingo now to learn a little Czech. I'm traveling to Prague later this year. I like it so far.

I have used it and it is ok, but limited to only a small set of languages.
For other languages, I have used Memrise which is very cool.
And for some languages like Chinese, specific apps (HelloChinese, LingoDeer a.o) are even better.

Duolingo and Memrise are very good.

The problems begin later. I lost motivation, ultimately because I had no use for the languages I was learning.

I'm still trying to master my own language. I'm dylsexic you know

Use Duo most every day for Spanish, Russian, and Korean. I have the advantage of experience in Spanish and took Russian in college, so I can in fact tell that Duo is friggin awesome.

That is a good one, Rosetta Stone Is great, and there is a new one coming out. It takes a positive mind, and constant work... its not that hard. Stay focuss. I studied french and spanish at college level. French is my favorite. Stay positive read and write every day. I will help you if possible, with questions or understanding the human vrs language learning and or reinforcement.

I can speak giberish as well ?

I've been learning Japanese with Duolingo for quite some time- not easy. I've also tried a few other online language courses, but Duolingo is probably my favourite. Good luck to anyone wanting to be bi-lingual.

I've been using duo lingo for both Spanish and Italian. I don't think I'll ever be fluent using it, but I think it's good enough to not be the stereotypical loud American tourist.

I've been using it for about 2 months. It works pretty well (though I have nothing to compare it to, so I guess it seems to work well!) I'm learning Spanish as well, and hope to move on to German after. It's very slow going, so I suggest you crank up the daily goal as high as you can tolerate. I try to do a lot more than the highest goal setting, or I feel like it's standing still.