You can also visit everyblock.com and follow discussions about the community to get some inside knowledge. The best thing to do is visit the area yourself -- how "decent" a block is a very subjective thing. Go and explore!
Go there in the evening or on the weekend and check out the neighborhood. If you feel comfortable talk to some neighbors on the block and ask them how they like living there. You can also check the chicago police website for information on crimes in any chicago neighborhood. There is crime in every community, it's up to you to decide where you feel comfortable.
Agents cant comment on this type of thing. Only you can know whats best for you. Go there at different times of the day and night. Go on the weekends, only you will know whats best for you and the family.