I visited 3 locations of this WHS in Bosnia-Herzegovina in 2022, namely Radimlja (the most important and best preserved location), Mramorje (just opposite, on the other side of the road) and Boljuni Necropolis I and II a few kilometres away from Stolac (also worth a visit if you have time to spare).
Mramorje is a mere continuation of Radimlja with very minor stecci compared to the ones in Radimlja, in terms of size, quality and quantity. At first I visited Radimlja in the morning and I wasn't happy with the lighting on most of the embossed engravings of the stecci. Afternoon light is much better, so I decided to head towards Boljuni Necropolis I and II. These stecci here are 100 meters apart from each other in the middle of a number of tobacco fields with lots of cattle grazing around in the fields and a circular open well nearby. There is no visitor centre or parking lot near this location so it really was a fun experience. I wouldn't skip Radimlja but if you have a car and don't mind driving in narrow winding country roads, a visit to Boljuni is highly recommended to enhance your overall stecci visit in Bosnia.
All in all, the main deterrent in Radimlja is the busy Stolac-Mostar main road passing right nearby the site. The petrol station and commercial buildings nearby have been quite a concern recently and the location is under UNESCO's radar. Hopefully, in the future the location of Radimlja will get better protection and conservation efforts from Bosnia, although at the same time I hope this won't mean having yet another WHS under some sort of tent. The best highlight for me was discovering the different engravings on the stecci 'coming alive' thanks to the gorgeous sunlight in the late afternoon.