equationgirl
Respect my existence or expect my resistance
You're certainly right about the thinness, it's very thin compared to notebook paper. It has a different surface though, which I think is why there's better sheen results. I did look to see if there were any notebooks available which use it, and found one at a fancy Japanese stationery shop in covent garden -for £40 iirc. That's two Lamy pens or two Moleskine books!!A lot of fountain pen folk will say that Tomoe River is absolutely the best thing ever and absolutely perfect for any ink or pen and... well, it isn't quite that great. Just to warn people. It's generally good paper but can have issues with drying times, and given that it's so physically thin there is always going to be some showthrough from the darker inks.
For playing around, it's fine but agree with you that it has limitations. If anything, it's light but feels cheap.