UPDATE 2022: It falls to 1 star because it simply stopped working one day and I only used it 50 times in my life. Unbelievable disappointment from Tefal. Never again!!
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4 stars because the first impression is said to be the most important, and the first iron I received did not produce steam while it was on and heating up. The store saw it and replaced it with another one that worked. But this makes me worry about its durability over time, meaning one day I will open it and it will stop producing steam.
Apart from that, it is a steam iron for vertical ironing, such as curtains and clothes that are not easily or not ironed with a regular iron, for example, some dresses. And of course, you can easily and quickly iron whatever you want, like shirts, etc. So, if you have a shirt and you want to iron it, you turn it on and in 15 minutes you can iron it while it's standing up without having to wait for the iron to heat up, etc. It can also be used for sterilization (due to the steam temperature) on pillows and surfaces that can withstand steam. Now, what exactly it kills and doesn't kill, I don't know, but the steam is quite hot, meaning you can't handle it.
As a device, it is small, quite compact, folds to save space, and sits firmly on a flat surface. Its cord is long enough and convenient. The water tank capacity is not that big, and if you have a lot to iron/sterilize, you have to constantly refill it. Of course, this is not its intended use, meaning to put a whole load of laundry in the iron. It is mainly for individual pieces and something quick that you want to do, like a dress, etc. However, it heats up the water very quickly, so you don't notice it. One negative aspect is that when the water runs out and it doesn't produce steam, there is no indication or sound, so even if you think you're pressing it and it should release steam, it doesn't release anything. You need to be mindful and check it.
For 45 euros, I consider it a bit expensive. If it were, for example, 35 euros, I would consider it a good value for money. But I don't think there is anything on the market that is so small and compact that can quickly do the job. However, with less money, you can find other options from different brands.