I have a Tak EM-200 mount and use the polar scope quite often, especially when the weather looks suspect to change { which has been the case for ages it seems, in Perth at least}. It usually takes me no longer then 5 minutes to have the mount aligned...... the Tak routine is simple, effective and fast.... the hardest part is familiarizing yourself with the sig-oct asterism
. In practice I've used a SBIG St2000 camera up to 15 mins and a DSLR 10mins with a ST-4 guiding using the polar scope for alignment. Its a great feature on the Tak mount which helped my decision to buy one with the hope it would help with set up times. Last night was a good example, I had everything to go within 15 minutes with clear skies but as per the norm lately cloud rolled in as I was going after the Rosette/Orion nebs with a few 5 min subs taken
It's a lot less disheartening when set up times are fast and less effort is required