I've eaten at 3 different Bagel House locations and I can verify that the bagels are the same everywhere: DELICIOUS!
That being said, I've only had food here at night (and at the other locations not), and the service is...well, let's just say it's a grumpy dude making and serving the bagels. I get it, it's 10pm/11pm/midnight/3am whatever the time may be. But dear lord, man, cheer up. He's a real downer. I mean, he won't stop me going there, but I just always feel awkward around him.
Then again, if you just grab the bagel and get the heck outta there, you'll be just fine.