It was an exact replacement, so I knew what to expect. Unfortunately slightly deeper than the previous 5 year old model, I had to lower the cooker over which it sits. Not a huge deal but a couple of hours wasted.
The hob is OK, it's the only one that fits into our 56cm wide granite hole otherwise I'd have got a different one - one with the larger rings. As such it's ok but a bit sparse on the features front. But it fitted!