How to check consumer offsets when the offset store is Kafka?

I'am using kafka 0.8.2 with offsets stored in kafka. This tools works good for me:

./kafka-run-class.sh kafka.tools.ConsumerOffsetChecker 
        --topic your-topic 
        --group your-consumer-group
        --zookeeper localhost:2181

You get all informations you need: topic size, consumer lag, owner.

The following straight command gives the enough details:

kafka-consumer-groups.sh --bootstrap-server localhost:9092 --describe --group my-second-application

You will get the details like this

TOPIC           PARTITION  CURRENT-OFFSET  LOG-END-OFFSET  LAG             CONSUMER-ID                                     HOST            CLIENT-ID
first_topic     0          4               4               0               consumer-1-7cb31cf3-1621-4635-8f95-6ae85215b31b /10.200.237.53  consumer-1
first_topic     1          3               3               0               consumer-1-7cb31cf3-1621-4635-8f95-6ae85215b31b /10.200.237.53  consumer-1
first_topic     2          3               3               0               consumer-1-7cb31cf3-1621-4635-8f95-6ae85215b31b /10.200.237.53  consumer-1
first-topic     0          4               4               0               -                                               -               -