In general, it has a narrow fit. I got the same size as my previous Salomon and it was barely small for me. The bad thing is that it lasted me 14 months. The sole came off at the front (on both) and it tore at the point where it bends due to walking. I wore it almost EVERY day, but nothing related to hiking, etc. Inside the city.

Excellent shoe for hiking, I might have taken one size larger. It doesn't slip, waterproof, comfortable

Owner of the SALOMON QUEST PRIME GTX (waterproof boot) and having done about 15 hikes with it, I gained confidence in the Salomon brand. I consider the Outpulse GTX a successful purchase as I found what I was looking for:
1. Low
2. Lightweight
3. Sturdy (no pain from rocks underneath)
4. Waterproof

Other positives:
Good grip on rocks and mud
No need for breaking in. I took 11,000 steps on a mountain right away and they didn't hurt me!

The not-so-positive aspects are that:
1. It is narrow. I'm talking about the width of the shoe, which is a bit wedge-shaped.
2. It doesn't have good breathability. After 8,000 steps, a lot of sweat had accumulated inside. (If moisture doesn't evaporate, the foot gets wet and blisters form). For Greek summer, definitely not recommended, look for something without GTX (Goretex) for better breathability.

Note: Don't expect the cushioning that some running shoes have, where every step feels like stepping on a cloud with shock absorption. It doesn't have that kind of "cushioning," it's a harder shoe. However, it's not like walking on rocks... they didn't tire me out on 2 hikes.
Also, the size might need testing. Generally, you should go slightly larger to be comfortable. Especially for hiking, because we don't want our toes hitting the front of the shoe on downhill slopes.

I will come back with durability after use.

Regarding transitioning to low shoes:
The difference for me is huge, as I have more energy to expend on the mountain, I don't drag my feet like with boots... Of course, what the very experienced say is true, that the boot is safer, more stable, protects against ankle sprains, warmer, more waterproof, etc., but hey, sometimes you want a low shoe too...
Overall, I think if you only have one pair, it should be boots. For a second pair, consider low shoes