I like that it's easy to upload, manage & share images in one place without having to navigate through multiple websites or apps! It would be great if you could filter out which files can/can't get uploaded into your photo library so we don't have 100s of photos stored as originals but not available for editing because they're just too big.
We are using grid primarily for uploading photos from our mobile devices since there isn't an app yet. This helps keep track of what needs sending where and when compared with emailing individual attachments directly via phone (which doesn't always work).