Have stayed at the Okkos in Paris & like their style.
Rooms are furnished sparsely, are not roomy, but bed linens are excellent & design is light, aerie, so quite comfortable.
And quiet: HUGE plus for a hotel in the heart of a city.
The Okko is a 5 minute walk from the main train station: one of the main reasons we chose it. Also right next to a big square & in minutes you're walking the pedestrian streets to the harbor.
Love the in-room Nespresso machine and common room coffee machines for cappuccinos, hot cocoa, Americano, cafe au lait, tea at any time.
Also a complimentary frig with juices, tonics, soft drinks & put out a bit of fruit, some crackers & cheese for nibbles.
Their evening apero hour (6:30-7:30 I think) used to be a self service buffet but now they make a couple plates of snacks & bring them to you.
If you don't want to pay for the hotel breakfast (a bit steep @ 18 Euros per person) just walk across the street to the fantastic bakery (you can see it from the common room!) We got baked goods, had them with the Okko's coffee and were set for the morning.
Tons of restaurants, cafes, museums, etc all around.
Staff is quite friendly & helpful.
With staff help figured out the system to buy transit book of 10 transit rides for 10 Euros (can be shared): took the ferry to Les Sablettes one day & on another to Hyeres Old Town. BOTH very worth doing. (Don't bother with the Hyeres Port which is mainly a modern marina.)