I am doing NSR since December. At first I guess I was forcing it too much in trying to think the syllable. I also had some problems with the meditation schedule. Sometimes it caused a lot of stress
if I was not able to meditate 2 time a day or was interrupted.
Now, after a couple of months I am taking it more easy. Reading this forum was of great help. Thinking the syllable seems easier, with less/no effort and I take it as it is. I try to meditate 2 times a day but if I have to skip it (for example if I have to get up early on Wednesday to drive my daughter to my parents) it is not a great deal.
Generally I meditate 15 to 20 mins, and the sensation I feel most of the time is some pressure or a tingling sensation in the 3rd eye area or around the head which feels quite nice.
After the discussion on this forum about the Italian pronouncation (saying the syllable with an 'R') I tried it out and I must say I like it a bit better as the 'L' feels a but unnatural to me (my native language is Dutch). I sometimes had the feeling that with the 'L' my tongue tried to 'speak' the syllable although I was not forcing it. Now I use the 'R' and it feels a bit more relaxed.
Generally the biggest improvement with NSR has been that I do not feel so tired anymore and feel more relaxed and feel more inspired to start new things.
Kind regards, Patrick