MessageDrivenBean Vs. Adpapter

[rashid g]

Hi All,
Currently my application is using JMS Adapter for serving the Client request.
As soon as message comes in the queue onMessage() is invoked and process the request
and finally put the response message in the queue.
I want to convert this thing to MDB (Message Driven Bean) rather than using Adapter.
Is it Performance issue using MDB than Adapter.
Can anybody share this thing who have use MDB.
Please dont write refer to BEA Doc/Sun Doc on MDB, I already gone through.
Thanks
Rashid