So I will give an update after 2.5 months of ownership:
I won't say the Nitron shock will cure everything but it did end my back pain. I realize that sounds like a joke but it isn't. I commute every day and my worn out stock shock had zero dampening left. My back hurt quite often and was always popping and cracking. I never thought much of it but every since I got this shock I have noticed it is gone. I think the fact I actually have suspension has made that pain go away entirely.
Aside from that the shock is awesome, it provides a plush ride and keeps you planted. I also like that you can adjust the preload while riding. You cannot do that with the stock shock.
Current bikes:2006 DL650
Past bikes: 2008 WR250R, XT225, TTR125, '04 CRF50 '74 DT125,'70 TS250,'85 v45, '89 zx600c, '78 GS400x, '99 GS500E, '01 GS500E '05 Z750s, '77 GS400e, '82 GS1100ez, '97 GSX600, '07 VFR800, '03 KLR650, '03 FJR1300, '06 DL1000, '00 KLR650, '99 WR360, '08 DL650, '05 DR650, '08 EX650r, '96 CR500, '82 GS450T, '06 Ural