Depends on your criteria
As an exuberant joy to its pilots - yes it was
For outright performance - yes it was
As a display crowd pleaser - yes it was
As a surprise to complacent U2 pilots - yes it was
As a weapons platform - probably not but it compared favourably with its pulse radar equipped contemporaries (F106/Mig21/MirageIII/Draken/F104) but, as we all know, its Achilles heel was fuel but this shortage did have the unintended benefit of providing an additional adrenalin charge for its pilots.
The fact that so many people are jealous of those that flew it speaks volumes and has to be a case for saying that it must have been 'that good'!