Even before arriving they make you feel welcome, confirming they're expecting you and inquiring wether you have any special wishes. Normal check-in is at 3 pm, but they had my appartment ready for me when I arrived at 1 pm.
I stayed in a studio appartment, and found it very spacious. Bathroom is huge, and in the kitchen you have all the appliances you need. I made good use of the washing machine.
Wifi is fast, works very well throughout the whole building, and is free. AC kept my room nice and cool during night, even when turning it off during the day.
Staff is very helpful, all though not present 24/7. Gym is fine, it's in the basement away from the appartments, so it's always accessible. It's equiped like a typical homegym, so nothing exceptional, but you can get your workout done.
I had no problems with noise from any other appartments, or the outside area. Location is exccellent, really close to public transport and the sights.
I also loved the app, with all the info you need. I would highly recommend staying here if you want to cater for yourself, and you need the space. I would definitely consider staying here the next time I'm in Lisbon.