Yes, well done on starting early, you will get much better results.
We started at eight months and J wore the helmet for four months. We didn't get a massive improvement but it was enough to make it worth while and really made a difference - so much so that I was very glad we had it done. His head will always be out of shape, but looks much better now. We could have continued for a while longer but things weren't improving and he also has other problems (a long narrow head) which made it harder to correct.
We had a lot of trouble with rubbing/heat rash and unfortunately there is not a lot that could be done about it. The advice is to use Sudocrem or Vaseline on the areas. J had particularly bad rubbing on one 'sideburn' piece of his helmet and some around the ears and back edges. Every time they went in they did say they would try and do something about it, but it never really improved. We used Neals Yard Baby Barrier every night (similar consistency to Sudocrem) and it did seem to help.
As for comments, if anyone asked I just said its because his head wasn't growing properly and people never really questioned much after this. I did avoid explaining the head shape issue so people couldn't give advice about this 'I knew someone who had that...' blah blah blah! You will find most nappy valley mums have either seen one before or don't take a lot of notice, kids do notice and are interested in it but he liked the attention
. I did discourage other kids from touching it sometimes if they looked like they were going to pull at it (especially the catch) but most other mothers are quite aware of this too.
As for staring on the street, I figured he didn't notice so I wasn't going to get too worried about it - I think you do get immune to it after a while. They do get more used it after the first couple of weeks. There is a support site, let me know ifyou want me to find the address and I will. I found it a helpful read at first as there are parents who posted saying my baby hates it - then came back a couple of weeks later and said that its all fine now.
TBH I can't say I miss it BUT we are very glad we did it.