I bought this telescope in the summer of 2018.
My amateur astronomer career has been short, I didn't start until 2014 for real. Now, there's a sliding roof observatory in my backgarden, and in the spring of 2018, I upgraded my Sky-Watcher EQ5 Pro to a Sky-Watcher NEQ6 Pro.
My main telescope was then a Sky-Watcher Explorer 130 PDS. My EQ5 handled that perfectly, but with an EQ6, it was time to scale up the telescope.
After a lot of considerations, reading online and advice on https://astronet.dk, I ended up choosing the Sky-Watcher Quattro f4 8".
The telescope was not in stock, so it was some loooong weeks before it showed up.
My first impression wasn't great, stars was "comet" shaped all over the field. When I checked the collimation using my laser collimator, everything looked just fint. I suspected the secondary mirror was out of collimation - and after some googling, I learned that a laser collimator in best case is worthless for collimating the secondary, and in worst case directly misleading (see at 6:15 in this video https://youtu.be/8ROvNH5uwDo). So after buying a chechire collimator and with the help of a friend, I got the secondary collimated.
To my big suprise, the secondary mirror was rotated ca 45° !!! - no wonder the star shapes were odd.

After the collimation was sorted, I am very impressed with the telescope - especially after I bought a Sky-Watcher f4 Aplanatic Coma Corrector, the stars are pinpoint sharp ant perfect round in the entiere field on my Canon 1000Da.

I bought this mainly because my NEQ6 was struggling with 12" Newt plus guider set-up, an EQ8 is just way out of my budget, much as I'd love to own one!

I have looked at and handled the 8" version, just my opinion here but think the 10" is better of the two, however the 8" scores on being a lot lighter and more compact.

On arrival the packaging was damaged, whatever happened didn't to the OTA but the collimation was way off but easily corrected. The focuser was and is very stiff, this is easily sorted by adjusting the tensioning screws.

Within a few days of purchase I did do a full strip down to flock the top section of the OTA, this is more or less standard for me, you can argue the pros and cons of doing this with me on SGL! However I did find that in stripping down that the 4 screws that secure the focus wheel to the focuser were loose and would have eventually worked free / out also the primary and secondary mirrors had some streaks / smudges from the manufacturing process, with the exception of smudges on the secondary these would not effect optical performance.

Because the focuser is collimatable I did set this as per the Astronomy Shed videos, out of the box it was about 5mm off the measured axis but this had not been noticeable when viewing / imaging prior to the strip down.

Since flocking the OTA I have been out with it almost every clear night, both visually and for imaging it is excellent. My kids like to view the stars so it is often set-up doing a sky tour for them before I kick off imaging. The fast ratio does test your eyepieces I have found my better eyepieces work well and give clear images but the 2" LET that came with my 300PDS really does pick up comma and needs correcting. My other scope is the monster 300PDS and visually not much will match it but the Quattro still produces some excellent views.

For imaging I am very impressed I use a Baader MPCC (which also works in my other scope) and gets good sharp stars to the edge of the image. The field of view is nice and wide, I am able to frame the Witches Broom and Orion Nebulae (M42, M43 and NGC1975) in a single frame on my Canon EOS 350D, the Pleiades were also nicely framed. All have imaged beautifully and I'm very impressed with results so far.

Compared to the 300PDS using a QHY5 camera it did not do as well imaging Jupiter but this down to the 12" scope having 50% more focal length and being able to produce a bigger image on the camera than the Quattro. The image the Quattro did take was sharp and well defined, despite concerns about the oversize secondary reducing definition. To be honest if I didn't have a scope with a longer focal length to compare with I'd be very happy with the image.

In summary I'm very happy with the OTA despite some initial niggles with the focuser, I expect most people buying one would check it over thoroughly before putting one on a mount so this more a niggle than a complaint. I'm still running down my target list but I'd certainly recommend this scope.

What a great scope, had it for about a year now. I was almost put of buying this scope due to the warnings about collimation needing to be so accurate and only being suitable for experienced users. I have no experience with reflector scopes and had no problem collimating the scope and found it stayed pretty much spot on, although I only move the scope from house to garden. I have been out in the cold of winter for many hours taking some great pictures and not found that the steel tube causes any problems with focus going off through the night. I think this scope is great value for money......oh! and also good for visual use. I actually got to see some really beautiful sights that I have not seen with smaller scopes that I have owned.