Upload & Sell: Off
Not too many people have actually used it yet. Here's my experience.
I made a new collection on my iMac called Ellen's Reception and I added 1034 images to the collection. The images synced to my iPad in mere seconds. Pretty impressive considering all of these shots were captured with the D800 and a few with the D700. My main goal here is culling. I use stars, so hopefully they'll add stars down the road, but flagging is fine for now. Culling goes pretty quick on the iPad, which is exactly what I hoped for. It will be nice to be able to cull through wedding galleries on the road or on a plane.
Keep in mind, unless you make the images available offline, you won't be able to see them if you lose LTE signal or WiFi. When I decided to make the 1034 images available offline, LR Mobile notified me I had 5.4gb of available space on my iPad Mini, and the collection I wanted to download would take up 1.7gb. Not bad! Downloading took quite a while, and it seemed to stop anytime my iPad went to sleep. Anyone know of a setting to keep the iPad downloading no matter what?
What about making adjustments? I have the old iPad mini, it's substantially slower than the new one, since mine doesn't have the A7 processor. So in my case, there's some noticeable lag when making adjustments. Cropping however was very quick, just like culling. The crop tool is superb.
Here's an annoyance though. If you don't download the images to your iPad, you don't technically have them. So what you're seeing is sent to you via WiFi or LTE. When you make an exposure adjustment, the image goes blurry for a bit, then comes back with the exposure adjustment applied. Not very snappy.
However, after downloading all 1034 images, adjustments went quite a bit quicker. They were very tolerable. And if you have the new iPad, I bet the adjustments will be instant.
How reliable are adjustments? I achieved very accurate exposure adjustments by setting my iPad brightness to half. Be sure to turn off auto screen brightness, just like you do on your Mac. Holding up the iPad next to my iMac, the iPad mimicked the exposure adjustments I saw on my iMac fairly well. I was satisfied. But this only applies to exposure. Color adjustments just aren't something I would advise, since my iMac is more saturated, you know? The color is just different between the two screens. But as for exposure adjustments, I feel safe making adjustments on my iPad and relying on them to mimic what I see on my iMac.
So why is any of this a good thing? Who cares? Well, if you have significant down time, instead of playing on Facebook, you can cull galleries with ease. That's a big time saver by itself. If you like, you can also make excellent crops, and fairly reliable exposure adjustments.
There are other features, quite a few honestly, but I've covered the features that appeal to me so far.
Things that are missing? Copying and pasting settings from one pic to another needs to be improved. The previous picture may not have the settings I want. For example, what if I want the settings from five pictures back? Right now you can't copy and paste like that...
Also, we need stars