I cannot comment on ASR but would offer the following in respect of Ghost v TrueImage.
1 I started off with Ghost but changed to TI as I found it easier to use & more reliable if I needed to do a restore. TI is much faster when compiling an Image file; typically 5min for Image & 3 min for verification (I always verify an image after compiling).
2 I compile my image file to an external USB HDD, and do a complete back up every month. Restoration is done by having a TI boot CD
3 My HDD is split, OS & Programs on 1 partition, data on a second partition; it is the OS partition that is backed up monthly.
4 In TI the size of the Image depends on the compressio ratio used (Higher compression slower compilation & restoration). My OS/Program partition is approx 6.5Gb; and with TI & normal compression the image file is about 3.5Gb
The unused bits of the partition are not included in the image file.
Hope the above helps