Does assetbundle work well with mobile devices?

primary asset bundles was created to download content you need only instead of all large content for future use. of course you got some performance issues on loading and unpacking bundles, depends on what type of bundle you use. usually bundles can be unpacked in background mode and doesn't take big effect on performance.

for different types of platforms you should make different asset bundles. bundles packaging is nice programmable in editor, so build process is simple two mouse clicks in menu and some time (depends on project) to pack project. so this is not so big problem.

finally, is you have 1GB of content and only 10MB needed at runtime but you don't know which part exactly will needed, you should use asset bundles.

but, if you have 10MB of content summary, it's not a good idea to use bundles 8)