There are bugs to work out. I think we have to remind ourselves what we're dealing with though. These things combine sophisticated complicated software, integrating with sophisticated complicated hardware, while flying through the air, with no room for error.
RC has been around for years, but the level were at now is all new.
DJI is not perfect, but I've looked at the units that compete with the Inspire 1, and the Phantom, and they seem to have more issues than DJI's units right now.
These competing units all look great, but I've read enough threads, and watched enough videos' to know they are not a great bet compared to the DJI line right now. (In my humble opinion of course)
Walkera scout X4
Hubsan Ora
Yuneec Q500
Voyager 3
Tali H500
I think in another year or two from now, the above units will be way more exciting with more proven reliable performance.
DJI will too though. !