I did enjoy the portable radar, only because I would toss it infront of me as a quick check for corner campers before I entered a room, sensor grenades are nice but they are too obvious, dont help your team mates and you need scavenger or they run out way too fast
One time my friend threw a sensor grenade next to me, I was like wtf is that thing. Then it exploded and damaged me, so I was running around red because of a worthless piece of equipment. Must be a core thing, just like the portable radar. Never used it.