By installing this kit do you have to lose the slam panel and bonet catch - having to go for aero catches??
Yes AFAIK.
Any updates on the trip computer and traction control with the gen90?
Still not available yet but I've been assured the firmware update to sort out the dash lights and other standard ECU functionality is on it's way. K-Tec have given me the cable already so once the update is out I'll attempt to apply it to both mine and John's cars.
Is this making the same kind of power and torque as the JMS set up?
Same ballpark and similar results, but as has already been mentioned all rolling roads are different.
ITB's look fantastic do they make the acceleration more neck snapping so to speak?
Not neck snapping no (you want boost for that ;-) ), but still a huge improvement. Power and torque are increased all over the rev range. Well worth the money IMO.