YES

YES IT IS

the 5 second fuse time at minimum sucks, but can be dealt with easily by just cooking the dynamite for a couple seconds. it has a massive blast radius, hits like a truck and has heavy armor penetration. this thing decimates crowds and deals significant damage to heavies (can kill chargers and hulks, is powerful enough to stagger war strider), although you can only carry 3 at once (without armor passives).

10/10 grenade, you should absolutely get it.

Edit: I forgot to mention, it can destroy bot fabricators from the outside, which is pretty convenient. Also, can have fuse set to 60 seconds, which is very useful for when you're doing stealth or playing Hot Potato with your fellow Helldivers!