Amazing protectors. Loud as can be and shake the earth so much you almost can't see straight, but goodness, they can kill pretty much anything attacking you! Had a level 5 or 6 that took on a theri that had taken out my Diplodocus (I have the immersive taming mod, makes life easy). Killed it in seconds. Oh, added bonus, they can carry a LOT mine carries a house's-worth of supplies pretty much all the time. Slow, bit SO worth it!!!
If you have trouble with fall damage whwn you dismount your bronto, i learned a way to avoid dying when you jump off:
Park bronto near base
Tame a tall rideable creature (parac, diplo, mammoth, etc.)
Park tall dino close to brontos tail
If you position the second dino correctly, you can dismount your bronto, walk down its back & tail, and walk onto the second dino. You can then drop down from this dino and take greatly reduced damage, if any. Hope this helps 🙃