I was just looking for collimation advice on google (the scope has been through 2 house moves since it was last used) and the first result was my old post from 6 years ago. I saw the request for a review now I've had it some time, although the request is old if anyone else searches for this scope they also may stumble here.
I only use it a few times a year at most, my old house had a north facing garden and so wasn't the best and the size of it makes travel to a dark sky site a bit off putting. My new house however has a south facing garden and is darker as well . So while my knowledge of the night sky is better than it used to be, I still consider myself a bit of a novice astronomer. I'm still using the eyepieces that came with as well as a barlow I picked up at a later date.
Setup - Put the scope outside for an hour or two so it cools to ambient temperatures then use the 2 start alignment.
Tracking - As long as the base is level and 2 star alignment has been done tracking has been pretty reliable.
Of the supplied eyepieces the 25mm is good, the 10mm is average. I really should sort out a replacement for the 10mm it's on my to buy list now I'm getting back.
I love the view of orion's nebula through the 25mm eyepiece.
As I live in a town I spend most of my time looking at the moon, planets, star clusters and binary stars. The scope copes with it all well. I can get ok views of some of the brighter nebula's and things like the andromeda galaxy.
The spotting scope that comes with it isn't great, I quickly upgraded to a red dot finder from first light optics.
The power lead supplied with the skywatcher power tank was loose and kept causing the scope to lose power require re-alignment, I replaced it with one from first optics that was longer and frankly much better quality.
I have just (today) updated the synscan handset to the latest firmware having been using the one supplied in 2011 until now. It worked perfectly first time from a windows 10 machine.
Travelling with the scope, I haven't moved the scope in my new car but the base used to fit in the boot of a mk5 astra sport without putting the back seats down (take the parcel shelf out) and the scope itself safely strapped into the passenger seat with a couple of extra elastic cords. Collimation stayed pretty good on short journeys.
The scope is still working well, touch wood I've only had one problem with was the scope slipping, a quick chat with first light optics where I got the scope from and all I had to do was tighten a single nut.
Finally I see I asked about astrophotography and it's fair to say you probably won't do all that well on nebula's (I haven't tried) but I've had some success with a modified webcam on the planets. To use a webcam with the flextube don't expand the scope all the way up, from memory leave it down about an inch and you'll be able to get a focus. These were taken some years ago and Saturn was done from a dark sky site. I'm sure with more practice I could get even better results.
The moon taken afocally with an iphone (I can't remember if it was a 3 or 4)
Saturn - Webcam
Mars - Webcam