I thought I would give a review of my Infinity experience one month down the line.
Move from Sky LLU to infinity 2.
The installation went swimmingly. It was a srtraight forward swap of the master socket. Immediate sync @ 79.4 (forcast was 66.2) so all good. Sync has never changed since day 1.
Download speed (over wireless & HH4) has varied but usually around 76.00.
HH4 wireless performance can be flaky. Occasional problems with DNLA as TV switches between 2.4 & 5 bands (TV don't move neither does router!!!!)
No drop outs etc.
Raiting so far 8/10 would be 10/10 if it wasn't for hh4 wi-fi.
Set the HH4 to a specific channel rather than auto.