This cycle is very mild in terms of what a lot of guys do, but it's also a very common cycle especially for the average AAS user. That said, you should receive some nice gains from this.
If it were my cycle, I'd run the deca for 12wks and the test for 16wks. Dropping the deca 4wks before you drop the test will greatly reduce the "harshness" of coming off cycle. running the deca until the very end can be difficult for a lot of guys, since it can be very suppressive and hard to come off of.
last off, most likely you'll be fine with this cycle, but if you start experiencing some low libido effects, either up the test by 100mg/wk or drop the deca down to 300mg/wk.