I've had this reducer for a while and it is an excellent reducer provided your OTA spec supports it. Read the TS spec carefully especially this part:

"The corrector is suitable for APO and ED refractors from 480 mm focal length and a backfocus Minimum 190 mm from the connecting thread"

If your OTA does not meet that 190mm spec you might not be able to achieve focus with the backfocus set at the right distance - i.e. racking the focuser all the way in might not be enough to achieve focus. 

I got this wrong with one scope I tried it on (the now old APM 107) and I had only about a mm to spare (when the backfocus was set right) after using a custom low profile adapter, which made the use of AF routines tricky. It's fine on OTAs with more room. If you are using a small sensor like a 533 class then you can make a bit of room by using less backfocus but the stars would be poor in the corners of aps-c sensor with that plan. I suggest you contact your OTA manufacturer to check the raw scope working distance. Some scopes have removable sections to create more room. 

Note that here I am using "Working distance" as it applies to the raw OTA. This is distinct from the backfocus needed by the reducer itself for optimal edge to edge image quality.
Like