I am using a couple of Gatti's.
The IM6 quality rods are regular good rods, fast action and sturdy. I am using these now for about 4 years and very regular. No problem at all, casts great.
The higher modulus rods are in general all fast action, very light and crisp rods. But, due to the thin wall also vulnerable. Hit one with a nice sized goldbead and it is likely to break. Most often not at once, but after a while (always when not expected). Of these HM's I am using a #4 for 6 years, but always a little bit more carefull. You could say that the high modulus Gatti's could be compared to a racing horse: if handled with care great to ride.