Brilliant light and brilliant reactivity, as before. I also have the Nao RL, which is an even stronger light as well as being more comfortable and secure with longer battery endurance, but the 'New Swift RL', like the 'Old Swift', is far more easily pocketed and stashed away. Much more convenient day-to-day.
The improvements I value over the 'Old Swift' are:
1. Probably stronger - the case seems more robust. My 'Old Swift' casing broke near the switch, rendering switch operation tricky and unpredictable.
2. Much better "Lock" function - I returned my first 'Old Swift' because the locking failed, and it was always slightly problematic on the second example.
3. I value the new RED LIGHT options, though have not needed them much yet.
4. USB-C charging is very useful, these days.
All in all, a real improvement on the already very effective 'Old Swift' light. Not sure I would have bought it if my 'Old Swift' had not been damaged, but it was, I did and now can really recommend this 'New Swift RL'. Even though the less convenient Nao RL may be a slightly better light for single, long, rough events.