I wanted to be able to track my basic progress wrt to heart rate, recovery times, etc. etc. I wasn't really interested in a Smart Watch … I find those physically too big when working out with free weights and weight machines.
My main criteria was it had to :
1/ Be comfortable and non restrictive when working out
2/ show the time (clearly)
3/ have a mobile app to track progress/show history
4/ track/show heart rate
5/ track sleep pattern
6/ long battery life between charges
This Fitbit Inspire 3 met all my requirement and a lot more – it is really comfortable and definitely doesn't get in the way while working out… and I hardly notice I am wearing it at night.
I find navigating around the actual Fitbit very easy – swipe left/right, up/down and tap for action… my only minor observation is only about 60% of the shiny 1 inch front display is actually used/functional – I would imagine the physical size of the Fitbit is due to the battery size, just a shame they couldn't have utilised the physical size to increase the display size of the screen… but it's not a bit problem for me.
Overall, I find the Fitbit Inspire 3 absolutely perfect – does exactly what I need (and A LOT more), great mobile app for tracking/showing history, comfortable to wear, waterproof for swimming and a long battery life between charges.
At £69.99 (January 2023), I would say that is good value and would definitely recommend if you're looking for decent activity tracker (remembering, this is NOT a 'Smart Watch', this is a a activity tracker only).

A Christmas present for my mum when her old one broke. She seems happy with it, a good quality watch that looks nice. Didn’t cost the earth – I think I actually bought it during the prime day sale. Screen size is good – not massive, but my mum is happy that she can see and use it.

Functions are pretty good and I like the app. There aren’t many choices for the clock face and most are quite unattractive in my opinion – the default one I think is the nicest. It can be a bit slow to respond to taps/ wrist movement awakening. I like the prompt to move around. The sleep tracking is very interesting but hard to know how accurate it is in the detail. It takes a while to learn all the functions and how to navigate round them but that’s fine. I bought the slim size one because I have small wrists but then do need my reading glasses to read the text and symbols – but that’s not the fault of the product! It paired with my iPhone without any problems so I can receive message alerts etc which is good. All in all good value

Very pleased with this bit of tech , it’s showing a lot of information ie sleep etc , sometimes Says I had a great sleep but I don’t feel like it sometimes 😂

Great for daily step count, and reminders to move and do 250 step each hour.

Very impressed with this little device, had a fit but years ago but haven’t used one for about two years. Easy to set up, charge lasts and you can customise depending on what you want to track (I.e. can link in glucose levels or body temp) whilst I am not using these I may in future and love the reminders to move hourly, making getting my steps in easier. Whilst the sleep tracker I would say is indicative, still great insights and useful.

I found this very easy to set up.
Accuracy seems fine, except for one time when it congratulated me on a swim and I was not near any water at all! I have however worn it swimming and it works fine in water and recognises a swim, which is great.
I am also tracking my sleep with it so I wear it almost 24/7. It is comfortable and didn't cause a rash like previous [other name brand] one did.
The battery has been great and lasts over a week – which is great for travelling.
The downside is it comes with the world's worst charger. It is a short cable and the bit that connects to watch won't do so securely, so my watch sits on the floor while it charges and I have to keep an eye on it now and again to make sure it hasn't disconnected itself from the charger. Bit silly for an expensive name brand thing!

Typical Fitbit- alright bit of kit but doesn’t quite do what you want. Cannot for the life of me get it to sync with Strava, yet won’t let me put my own workouts in, only tracks it itself- which it does very inaccurately.
Sleep tracking is good – one redeeming factor