As long as you know what you are getting, you will not be disappointed with this projector. I went back and forth about whether to get a projector like this. The deciding factor was last summer when I was able to watch a movie using a friend’s projector on the side of a tent in Kuwait during a normal windy day. Even with the constant door opening and the other tent-mates leaving their lights on, we were able to enjoy the movie. Since buying my own I’ve also watched it on a wall in a hotel that locked its HDMI ports, the side of my house and a blacklight curtain ($cheap from Hobby Lobby) hung from an RV awning.
If you are looking for extreme high def, knock-your-socks-off 3D action, shame on you for looking at a projector you can hold in your hand. This is for portable viewing on the side of a tent in Kuwait, not a home theater replacement.
Although the unit itself is quite portable, in practice you need a lot more stuff to make the experience worthwhile. First off, if you intend to use this for anything with sound, some sort of external speaker is a must. The built-in speakers are barely loud enough to hear if you keep your ear against the unit during playback.
As mentioned, the limited internal memory and the inability to play files over 2GB on memory cards means you’ll probably need another source for your media. My friend in the desert used his iPad to stream media via his AppleTV to the projector. I use a DVI-HDMI cable with an HDMI-mini HDMI adapter to connect my laptop to the projector. I run Plex on the laptop and keep my entire movie collection on 3 external 1-TB drives.
Since you’ll be needing plugs for the speaker and media source, you might as well plug the projector in as well, so I’ve never really tested the battery capacity.
In addition to these requirements, you’ll probably want a tripod to help you setup the projector, although I’ve successfully used mine balanced on a hotel guest info book. You might want to look at a screen for those times when a white wall isn’t readily available. As mentioned above, a previous reviewer recommended buying blackout curtain material at Hobby Lobby for something like $5/yd. That works great as a screen. I also carry around some of those big binder clips so that I can attach the screen to the gutter of a house or the awning of an RV. A roll of duct tape will help attach the screen where the clips won’t work.
In the end, you’re getting a projector that can fit in your pocket, but you also need to bring a small duffle bag worth of stuff, plus a laptop or other media source. If you’re looking to have neighborhood movie night outside or watch flicks at the RV camp where quality expectations are low, this is for you.