Hi Victor,
i also use Eye and Telescope since several years now. IMO it is very user friendly and allows 1. adminstration of Astro-Projects; observing planning (nice: it gives you an feeling how difficult the object is with your scope and your sky conditions), log book and creating star charts. I use all these features and they work very well.
Interface to The Sky also is working fine.
I personally have no experience with "sharing observations" with others, but friends of mine us deepskylog.
Clear Skies
Marc