A1100IS takes pretty high IQ pictures, due to the the newer D!GIC 4 processor, also found in the more expensive IXUS series, but one thing to note, the AF speed is not the fastest in it's class
using it for close to 7 months now:
pros
- D!GIC 4 processor > good IQ(compared to other cameras in this class)
- flash adequate
- uses AA batteries(good for travelling)
- the smallest A-series ever made(almost as slim as the sexy IXUS)
- very beginner-friendly
- even though the body is plastic, it still feels pretty solid
- 3cm macro
- decent battery life (close to 500 shots with 2100 Ni-MH batteries with flash on around 25% of the time, alkalines around 200+, YMMV)
cons
- AF slower than competitions
- no manual modes(Av, Tv priorites etc.)
for me the deal breaker was the power department. for a compact P&S I felt AA-source was the more pragmatic approach, as I would not be crippled by buying the expensive the proprietatory rechargeables, nor lugging around a battery charger when a trip is short.
For around $50-80 more you can consider the IXUS 100IS, uses the same D!GIC 4 processor, slimmer, sexier, but uses proprietatory batteries
hope it helps