Not a tech writer but here goes....
Received the Pro 68 ( yes...not the 78) and have had a few days of driving with it. I can only compare it to my Whistler Pro78/690 and 330.
Very nice looking unit. Display is bright and easy to read.
Programming includes the ability to turn on/off:
and turn on and off an additional FILTER
of course the 3 City Bands with City2 being X turned off.
2 blue flashing periscope lights are also configurable to your own taste.
No Voice available.
Operationally it is very good. Picks up Ka as good as the Pro78 IMHO and real world experience. K band also. Picked up a C/O Ka from well over a mile and over two gently rolling hills. Ka again from a side street running 90degrees out from me....LEO was about 1000 yards down the side street and I was approximately 200 yards from the intersection when it went off....I saw him as I rolled up to the intersection. 1 K band from well over 1 1/2 miles...it was a radar trailer that tells you your speed.....Quiet as can be so far....in San Antonio it only "bleeped" on a Ka for a second...other than that is it is a very quiet detector. I am impressed. No laser so far.
It is rock solid in the mount and does not bounce around.
So far I have been running:
It is very easy to read in the bright sunlight. Easy to hear. And has performed as well as my Pro 78 or 690. Michael and the boys at Whistler have done very well for a $85 detector in my book. This is a keeper.