I recently tried the TSR and finded it was a good introductory kite. It surely does not turn has fast has a 4 line handle one, but it's a real joy to see it fly smootly in a bigger wind window then lot's of other kites (Firebee or Radsail). Good review Vince!
I was also supprised by the good value for money of this kite. I can also say, compare to a 5.5 Rombus Firebee, that the Radsail 5 is much more stable, have less tendancy to luffing and have a bigger wind window. I think it's a great kite to start off with... not meaning you don't need to be cardfull with the amount of power it can generate.