Without a doubt The Bass Gang (the italian quartett of double bass) is considered one of the best classical-bass-ensemble in the world, some critics talk about them as the best.

But imho they have great skills under these points of view. Antonio Sciancalepore, Alberto Bocini, Andrea Pighi and, last but not least Amerigo Bernardi (quartett's members) have an important thing in common: they all play in great italian Orchestra. Well, they also teach, play as soloist and so on ... but the great experience made in these Orchestras (also all over the World), has provided them an immense stability and an incredible tuning in all their performances.

I read someone on Youtube has told they are out of tuning when they play togheter. I think it's a "bad" thing to tell, just because The Bass Gang is the most requested db's quartet in the world. I think there will be a reason ! By the way it's only my honest and no important opinion. But I think it's not beautiful to go against someone under a nickname. But I'm sure The Bass Gang have no need of help because their incredible skills talk for them !! All the best from an "italian" db. player ;-)!