Timegrapher info wanted

I am looking to purchase a Timegrapher. I don't intend to try to repair anything I am just interested in the accuracy of the watches i own and ones I purchase in the future. A OF search turns up lots of references but no specific discussion on which to purchase.
I found a Weishi No.1900 Multifunction Timegrapher on Amazon.
https://www.amazon.com/OTOOLWORLD-C...1&keywords=TimeGrapher&qid=1591195611&sr=8-1&
Great reviews but I am wondering what the members here think about the unit. Perhaps @Archer, or @X350 XJR might have some insight?
Thanks in advance.

I have this style of machine in my closet - I use it as a back-up in the even my proper timing machine is out for repairs or recalibration.

If you can find a model that has menu options in buttons on the case, rather than having to scroll through screens, it will be more convenient to use.

Also, I don't know what watches you intend to use this on, but if it includes co-axial escapement watches, note that despite the claim that it will work on co-axial watches, it doesn't have the specific programming required to properly display the balance amplitude on these watches. So the timekeeping information is okay, but the balance amplitude readings will not be accurate.

Cheers, Al

Thanks everyone. I grabbed a 1900 series from Amazon. Be here Friday. Good starter unit.