Theses are good locks, but the measurements are a bit hit and miss. While they are flush inside, they aren’t outside and there’s no guidance other than measure to the outside of the handle plates, which I did. So either be prepared to send them back to get the correct size, or add 5mm either side

Fitting the locks is very simple and straightforward with only basic tools. They look good in the door and having KeyAlike is a great feature to have. Buying spare keys at the point of sale is cheap and worthwhile, especially if you have teenagers in the house! One last thing, the mechanism needed lubrication and then the keys had a nice feel when locking and unlocking.

Peace of mind that very few people are capable of getting through this lock is well worth the cost of upgrading, plus they can be keyed alike, and the thumbturn is very convenient. All locks should be made this robust really, standard locks are far too easy to snap or pick, and don't offer any serious security like the ABS Avocet does. It feels well made, fells solid and is a doddle to fit by even the most basic DIY enthusiast. I sleep well knowing my doors and home are safe, secure and protected by this good quality and very robustly made lock.

These cylinders are very secure, the key is robust (could ever imagine it snapping), and the thumbturn action silky smooth.

Easy to measure, ordering from Safe was great, and simple to install.

They're expensive but worth it.

easy to fit & use, great quality & very secure.

This (plus a matching key both sides cylinder) were used to replace one old cylinder (converting it to thumb turn on the inside - so much more convenient) and a second (outer door) cylinder that was only a year or so old but had started sticking, and could not be locked from outside. So far the new cylinders are good - quality is noticeably superior to the old ones, and the key matching service was very handy. Not cheap - but in this case I think the quality and additional security more than justifies the price. Ordering process was straightforward and they arrived as quoted.