Since "good to buy" is always in the eye of the beholder, the best I can do is point you at a couple of resources with data and let you decide for yourself what is most appropriate for you.
For various crime statistics, you can always call the Fitchburg police for the latest crime statistic, or you can look at some stats on the web like http://www.topix.com/crime/fitchburg-ma and perhaps the local paper http://www.sentinelandenterprise.com/police
Compare those stats with perhaps other neighborhoods with which you're currently familiar, perhaps where you live now ... so you can have some context.
If you're interested in school ratings http://www.greatschools.org/ and if MCAS results matter to you, you can look at the state website at http://www.doe.mass.edu/mcas/results.html ... again, I highly recommend that you compare it with a neighborhood with which you are familiar so that you have some context.
Best wishes and let me know if I can be of any further assistance!