Synergy 2 “Ronbox” tuning box

Hi there, one month into Rover 75 ownership, wish I’d got one years ago!
Just wondering if anyone in 75/ZT land has had any experience with this product. On YouTube a chap in Scotland had fitted one to a 255k miles tourer and was impressed with the results, (low speed uphill pick up etc)
I have just ordered an EGR Bypass kit, for that same reason, better low speed pull and drivability. Anyone out there who has any experience, opinions on this will be most appreciated.
Thank you, Regards Steve