My first impressions...
Much better two up handling. The Wilbers shock is on factory setup according to my weight specifications and riding style, i didn't change anyting on it on installing. I can't say it improved a hell lot more compared to the stock Showa shock, i think the stock shock is decent enough, but still the improvment is clearly "visible" with the Wilbers.
Rear wheel just has better contact with the road's surface. We kicked around on gravel around 100kms today and few forest offroad pistes and the bike certanly had more control.
Showa has done 50Kkms too, so it's probably about to ware out.
On this Wilbers shock indeed i have done a mistake not adding the hydraulic preload adjuster. The spring is over-preloaded for solo riding and i apparently can't adjust the preload w/o taking the shock off again...

It's not hard job, but still, for lot of adjustments it'll be pain in the arse. I'll have to see if there's any smart trick to it access it with the c-spanner, i.e. lifting the fuse box slightly up or something to access the shocks upper part more easily. If not, then adding the hydraulic preload adjuster maybe next season.
I highly recommend the Wilbers indeed, the guys are fantasic and very supportive, service costs and intervals are the best i know compared to Öhlins or WP, and with the new shocks they give 2 (to 3 years!?) of warranty, i got 1 year for the rebuilt and readjusted (used) one bargain i got off from their eBay section
