Yes, it is worth sitting for round 2 of counselling. You can get better course or center from the round 1 or you may get a seat if you were not allotted in round 1. Round 2 always brings better opportunities. So, you should give a shot at attending it.
And experiences depend on situations to situations..person to person. Everyone will have a unique experience.
The people who got new centers in round 1 got better centers in round 2. Some people got choices amongst the centers or the course provided. While some of them got a chance to attend counselling who weren’t allotted a seat in round 1. So, give a chance to round 2. Always..