Forward testing through oanda and impressed so far. As with most methods, sticking to the plan during drawdown (which can be large with Hans123), takes strong discipline, but the performance stats are quite reassuring and from what i've seen so far the method's edge doesn't take long to kick back in. Hans recommends a 25k account to trade with full lots. His results since Mar 2005:
 
2005
March: +721 
April: +940 
May: +296 
June: +857 
July: +1352 
August: +35 
September: -20 
October: +1630 
November: +554 
December: +345 
2006
January: +645
Statistics since the start of Hans' thread (18th Oct), updated mid Dec 2005:
 
Number of Trading Days: 53
Number of Winning Days: 26
Number of Losing Days: 27
Percent Profitable: 49.06%
Average Result of Winning Day: +146.46 pips
Average Result of Losing Day: -84.07 pips
Average Result: +29.02 pips
 
Largest Winning Day: +400 pips
Largest Losing Day: -253 pips
Max. Consecutive Winning Days: 3
Max. Consecutive Losing Days: 4
 
Max. Profit: 1,671 pips
Current Drawdown: 133 pips
Max. Drawdown: 449 pips
 
Win/Loss Ratio: 1.74
Kelly value: 0.1969 
Math. Expectation: 0.3426