The process was quite good, from making the initial enquiry, to talking to people over the phone to work out the best product, to organising the measure and the installation times.
The only negative part of the experience was the final installation of the new glass window. The installers initially told us that they would match the existing safety decals on the original window, only to then later say that they wouldn't be putting any safety decals on at all.
I understand that this may be out of La Luna's control, as the installer is (I believe) a third party, but it just put a little bit of a dampener on the end result.
In terms of the door itself, it is an excellent product. The dog only took a day or two get comfortable with it, and it has made the world of difference in letting her come and go as she pleases.
During strong winds, the flap does tend to blow inwards and remain a little bit ajar letting in a draft, but I have attached a little strip of fabric to the door to mostly prevent this.