About one month ago there was an attack against burstcoin network. Another attack took place yesterday so the associated sites are currently down.
Attacks against mining pools might affect the network infrastructure.
About 6 weeks ago some attacks took place against the network and the devs came in a few days with a fix for unconfirmed transactions:
Currently, I'm looking for under-ratted coins to invest in and burstcoin looks quite appealing despite the technical issues.