Безопасен ли lingualeo.com?

I've been learning English here since Sept 2011. Now I am at 80+ lvl for about year or two for now. I've been studying pretty hard (and still do) to get more than 35K words and phrases to my dictionary. I know nothing about the other guys here but learning this stuff 2 hours per day is definitely gives you great results. PROS (from paid membership POV): 1. Trainings are excellent (but sometimes Brainstorm freezes a bit and gives me pics I have never chosen) but that's okay. 2. Courses are great but they are mainly for beginners. 3. Content is excellent and everyone will find something nice. But different strokes for different folks tho. 4. Browsers extensions are absolutely awesome. Just think about it: you can grab any words from the Net and put them in your dictionary instantly and learn them like a man possessed. 5. Price of paid membership -it's dirt cheap, but if you don't want to learn -don't pay for it! Because it's gonna be waste of your money and time (Quick example: you can see (using search engine) 12.5M registered users on the site and only 1.1M have reached 10lvl and above. That's about 9%. Do the math.) So the bottom line is -paid membership is great but not necessary, it's all depends on your goals and motivation. 6. FUN! It's always been (and still is) fun to work here. CONS: 1. Grammar courses are for beginners (or kids) only. I've been using Cambridge Grammar books to learn grammar (they are great). BTW, if developers want to expand grammar section and make it work, they MUST to get in touch with Cambridge and make these books in interactive format on the site (all legal issues aside) and make them with lots of exercises. Do that guys and your grammar section will become great not only for kids! But it's gonna be pricey though.