I'm using the Sigma Plus. I'm satisfied.
If one should be really demanding, there's only two things I would like to see better: 5,4 volt cut off, instead of 2,5. And average voltage measurement. But I dont find that this is enough to justify buying the LRP Pulsar or the GM VIS Commander. There are other things I need first, like a setup board and more batteries.
So I'll keep on using my Sigma. The buttom line is, it really gives my packs the punch I need in stock, it charges NiCd and NiMh and it is reliable, no false peaks etc. What more do you need?
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250