The problem that I consider serious is that the specific one I purchased is that it has menus in Spanish, so you have to find the user manual in Greek!

Very difficult menu. Especially the display of missed calls is both difficult and unclear. Also, the ringing sound takes longer to start compared to the existing landline phone.

Very good device for an elderly person, it has large numbers and a screen. When someone calls you, the green button flashes for easy answering. The only negative so far is that its batteries don't last long, but this can be solved by buying and using new ones with higher capacity.

Unfortunately, for an elderly person with vision problems, pressing 2 buttons to see who called is not easy. If you press the middle button with the arrow a little longer (instead of instantly), the sound is muted and there is no indication on the button to understand it. Only by searching, but an elderly person cannot do that. I wonder why they didn't put the indication with the bell on the button so that you can understand it immediately.
Decent volume, satisfactory ringing and night lighting, and moderate battery life.
It does not have enough features (hence the price), but do not forget that an 80+ year old user is nothing more than the basics.

With the receipt of this set of phones, replacement of rechargeable components (batteries, that is) with others of serious construction should be done! Essentially, the main problem I have encountered is the incredibly frequent recharging! However, it is a very good device in all other characteristics.
Thank you.

Satisfactory device with good screen and button lighting, as well as strong ringtone volume. Also, strong sound in the earpiece during calls and in speakerphone mode.
The process of viewing missed calls is inconvenient as you have to press and hold the star button, which will likely wear out quickly. Additionally, there is no option to view the call history of incoming calls, only outgoing calls.
The batteries included in the package are not sufficient for frequent, daily use of the device for more than 2 hours of talk time.

I bought it for my mother who is elderly and doesn't hear very well, and this phone serves her very well! Very good notification sound when someone calls and the fact that the mobile lights up during incoming calls helps a lot. It also has an option for extra volume of the receiver, but unfortunately, you can't always have it active. You have to select it for each call and my mother can't manage it. However, even without it, she hears very well (we couldn't talk with the old phone when calling). She has been using it for 1 month and I can't have an opinion on its durability, but I can say from its usage so far that I am very happy that I got it for her.

Good choice for the elderly, strong sounds, I suggest combining it with the purchase of larger batteries for even greater autonomy.

I got it for my 95-year-old mother, who can't see either the keys or the screen. She's trying to find the Open and Close buttons A and B by touch. Unfortunately, the buttons are smooth and she struggles to distinguish them by touch. Also, the space between the buttons is very small. Overall, she's having a lot of difficulty. Basically, I think the designers didn't take it seriously enough.

If an elderly person is able to use this phone comfortably, they can also drive a rocket!!! I am amazed at the audacity of the manufacturer claiming that it is for the elderly. Stay away

It is a good phone with more features than average. I got it for my mother, I have used it myself and also discussed with her to see the pros and cons. The buttons, their lighting, and the sound are perfect for elderly users. However, it also has some negatives. Firstly, it is very expensive for what it offers. Also, something quite annoying is that because the font is quite large for easy reading by the user, you cannot always read the entire information (e.g. in emergency calls). Other negatives, not as significant, are that it has very old school (and few) ring tones, that you cannot reject a call with the red button, and something that is not common but would be needed for an elderly person is the ability to block certain numbers (usually from advertisements, etc.).

Excellent phone with a large screen and buttons. Very good range and battery life as well. I recommend it.