Micro Projectors - are they worth it????

Hello,

Are micro-projectors worth it? I have seen a few of them on the market, but I haven't read many good reviews, just mediocre reviews. I want to use microprojectors to watch movies, use my laptop, and play PSP games on it. So far I've seen these:

AAXA P1 pico projector - $219.00, 640x480 12 lumens
http://www.aaxatech.com/products/kp190_p1_pico_projector.htm

Optoma PK101 - $229, 420x320 10 lumens
http://www.optomausa.com/Product_detail.asp?productsubcat=26&productcategory=Pico+Pocket+Projector&product_id=399&itemno=EPPK-101

3M Mpro120 - $349, 640x480 12 lumens
https://www.3m.com/3M/en_US/office-us/?utm_medium=redirect&utm_source=vanity-url&utm_campaign=www.3m.com/3M/en_US/office-us/projectors/

What do you guys think? Can someone with experience with these projectors answer?

Thanks!