Wouldn't know about grid. I only use blanks and I find the paper fits a G2 pen perfectly. Maybe I lucked out on combination of favourite pen and favourite notebook and also on quality consistency here in Europe (I'm actually just 500km from Milan, where the company is based).

Also I only use the soft cover ones, so maybe that affects their quality as well because soft covers are less prone to breaking and ruining the stitching.

Here's my report from a few years ago: http://swizec.com/blog/notebook-fetishism/swizec/2729