9/10 from me; it remains my favourite series.
I watched it before I knew what moe was or was aware of the poor reception such a word receives amongst a certain subset of fans, so my enjoyment of it wasn't hindered by these notions.
Whilst it seemed to be a slow burner initially, the Makoto arc quickly turned it into one of the most prolonged and memorable emotional experiences of my life. Scenes such as Ayu falling from the tree or Yuichi breaking down as he finds the headband beneath the snow-covered bushes were handled with heartbreaking perfection, and the supernatural premises didn't overpower the series; the fantasy elements often augmenting the cleansing effect the show has. Plus, the male lead has a varied character and ultimately shows as much emotion as the girls, an added bonus for the drama.
Naturally, many others will either admit that it is either a guilty pleasure, or will express the polar opposite of the points I make when giving their opinions.