Yes, 490 is generally a good CRS score, however, the lowest score required to receive an Invitation to Apply (ITA) varies from round to round and also depends on whether candidates from a certain program or category are being issued ITAs. The CRS score will usually need to be substantially higher for ITA rounds that focus solely on PNP nominees (for example, a good CRS score may need to be in the 600s or 700s), since 600 points are given just for having a provincial nomination, in addition to points received for other factors.