I use Bridge all the time. Firstly it gives a preview of RAW files when imported, which is all I shoot, so I can easily see what has been captured. You can add to the EXIF data, which I mainly use to to add Copyright information and status. You can also add descriptive tags, which I must say I don't do that often, even though I probably should have with the number of images I have.

I also rate images, which helps to organise and cull the good ones and definite duffers. I can also use the Tools menu to open a set of images as Layers rather than individual images in Photoshop. I can also resize and output RAWs as Jpegs.
I prefer the Camera Raw interface for RAW processing, and although working the same as Lightroom, in one specific area, manually straightening an image, Camera Raw is better imho, as you can zoom into the image to align the image to a small area in the scene, whereas in Lr you can also draw a line to align to in the image, but, afaik, you can't zoom in while doing it.
A lot of that can be done by Lightroom, and some of that can be done on import at the same time, as some things can also be done on import in Bridge, but I would rather import my images directly to a folder on my computer, and then look at the folder with Bridge as that is the quickest way to import, and also quickly see the images for me. Lr has to create previews. I only use Lr for my travel images, and then I import into a Catalog from the folder on the computer, and I create Smart Previews, which take a little longer, when doing it.
One thing I do like, is that it can be set to import, then to erase on completion of importing.
As said above, I import directly to a folder on my computer, and don't delete the images on the card until I have seen the images in Bridge. In fact I tend not to delete the images from a memory card until I need to use it again, when it is a two button process to quickly format a card on my camera. And that is 4th back up for awhile.

I wouldn't personally import and delete at the same time just in case something were to go wrong on import. If it works for you though, great.
