A good, all around notebook/sketchbook.  I've always preferred unruled pages for the greater sense of freedom.  There will be some bleed through, depending on what kind of pens you use.  I've found regular, old school ball point and the Pilot G-2 series of gel ink pens excellent choices for these pages.  I use the G-2 0.38 and 0.5 points for drawing, and the .7 point for general writing.  The book is well constructed and sturdy.  I've owned 10 of them so far, and there have been no quality control issues.  Not a good book if you're planning to splash on watercolors or scribble away with Sharpie markers, as there will be some buckling and bleed through, but the paper responds very well to B and 2B grade leads.  For dense ink work, two pages can be quickly pasted together using a Scotch 3M permanent glue stick or similar to create a nice thick "plate" that won't bleed thru with india inks or Copic markers.  The price is great here on Amazon, and the versatility of these books is boundless.