tl;dr It's good and you won't regret it.
Frankly, I chose Kista Trafikskola because of the reco reviews and its rather competitive pricing. I've never driven before and chose to buy 20 lessons, started in the beginning of June when my school ends. 80 min is just right, not too short so you just drive in-and-out, and not too long that you feel bored. Raymond was my instructor and I had the lessons in Swedish, he can also teach in English and Persian I believe.
My 20 lessons ended late June and I added 10 lessons just to get extra ready. I had only one chance because I was going to leave Sweden and I had to get it right the first time. I bought the theory book and 20 distanstest, read the book, did 15 tests, passed the theory test easily on 10th July. Uppkörning on the 21st, I just drove like I normally would and it went very well(except that I hit the wood when I was parking._.).
It was good that Raymond made sure that I am capable of passing the test before the actual test. It is true that too many people take the test too early and fail(<40% pass rate), Raymond will indeed make sure that you aren't one of them when your test comes, if you choose Kista Trafikskola that is.
Needless to say, I had a good time and I got my license.