I bought 3 Cressi Leonardo off Amazon on prime day for 99€ each for me and my sons. A good bargain.
These are basic computers, good for recreational diving.
Single button control.
Properly conservative.
Of course there are better devices around, with bright colorful display and more advanced features. But they cost 3-6 times more!
And in the end of the day on each dive you spend just perhaps 30s watching the screen of your computer, and 30-40 minutes watching around.
So wasting a lot of money for a device which you use so little is not advisable, for me.
Better to spend money in some more dives or in equipment which really improves your experience, such as a stretchy, confortable suit or a good pair of fins.
Is the Leonardo "less safe" than others computers?
I do not think so: being simple, rugged and quite conservative I consider it safer than other fancier devices.
The only real drawback is that you need an accessory for downloading the dive profile on your computer.