G1 likes:

- GPS and other sensors.
- Physical keyboard.
- Touch screen.

G1 dislikes:

- The phone is painfully slow with Java due to interpreter-only
processing: in tests 5 to 10 times slower for computational work than
SonyEricsson Xperia X1 (same CPU as G1) and also 5 to 10 times slower
than even my old Nokia 6680 (220 MHz ARM-9).
- The phone is painfully slow with camera-based image processing;
there is no API for decoding camera views, and this must be done pixel-
by-pixel in Java (interpreter mode again).
- Poor battery life. Probably also related to interpreter-only
processing making that the CPU has to run many more cycles to perform
any given computational task in Java.
- The 16 MB heap limit for apps.

Regards

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