Isofix - how much is the seat back affected?

[Gorsh]

I'm thinking I may choose Isofix for the front passenger seat on my GTS as I may find it useful - we have 3 grandchildren with another due soon.

Can someone please tell me how much the backrest tilt is restricted? Is it only at the extreme ends of the forward or backward tilt - or does it affect a normal seating position or stop the seat reclining much?

Thanks - I'm keen to get my specification finalised, then I can settle down to waiting.