Horrible product. No real instructions on how to put the unit together. One of the grub screws came loose and stripped the motor. I had to disassemble the unit to get it off the scope’s focuser. The assembly videos were a joke because they did not go into any detail as to the assembly process. The person from PrimaLuceLab needs to take the assembly process seriously and not treat it as a comedy skit (if you go to their web-site you’ll understand what I’m talking about). A complete waste of about $400.00.
Awesome focuser. So far it is working great with my refractor and GSO Linear Focuser. I have been getting great repeatably and good V-Curves for focus. Dave Collings - Blue Ridge Observatory
I've used the focuser several times now, and am impressed. An electronic focuser an item that I'd been on the fence about for a while. I knew I needed one to make my process repeatable, but frankly didn't like the mounting options that were available in the market. When I found the Sesto Senso 2, I hastened to verify fitment on my ES AR152. Notes on that here: https://www.cloudynights.com/topic/692824-coarse-focuser-knob-removal-es-ar152-achromat/ It was easy to install, and works well with my APT control software. There is an ASCOM focuser driver available on the mfr site which works well. The focuser is easily configurable. I have run into no problems. I do have some slippage because I have a Crayford style focuser that slips when my scope is near zenith. The focuser has a feature to actively hold position. This small difficulty is manageable for the time being simply by zeroing focus position before each night of imaging, and ensuring that the focuser tension knob is tight. In the long term, this has pointed out to me the benefit of a rack and pinion style focuser. In short... buy it, I think you'll like it.
Measure your focuser before ordering. Waited 3 months for the senso sesto 2 only to find I needed an adapter to fit my focuser. It only comes with a cigarette lighter power cable and the barrel connector on the other end does not fit standard 5.5mm x 2.1mm plug. I had an issue at first where having the focuser connected to the computer would randomly disconnect all other usb components. I found the solution to be connecting sesto senso 2 only after all other components were connected. Everything works great now.