I love the colour yellow, its not a good colour for fountain pen ink but it does look good on pens and cars. My dream car is a Lotus Exige S in Metallic Yellow. I am unlikely to own the car but I do have this yellow pen.
The H-B nib is not as fine in relative terms as the the finer Sailor nibs I own. It is as broad as most of my European broads. It still is quite stiff but has good ink flow.
I like J.Herbin but I don't like this shape of bottle. It is squat but is too shallow, especially when the ink has had a few uses.
Eclat de Saphir (Sapphire Blue) is nice blue, not the most exciting I own. It is a good safe ink that I use in all my pens.