The Pilot's Notes for the Attacker F1/FB2 doesn't seem too frightening. Taxiing with the tailwheel may not have been easy, trim had to be carefully watched and the earliest examples were best not operated over 35K due to pressurisation concerns. At least it had an ejector seat and could be ditched successfully! I suppose it could be classed as adequate for its time. Never seen the PNs or flight test reports for the Spiteful or Seafang.