4-5 hours seems very restrictive still. I work in a podunk town which has crappy cell service and I cannot use the internet at work for personal use. Honestly it needs to be at least 12, but preferably 24 hours. I am happy for the people who have great internet 24/7, but it does not apply to all areas.
I have spent money on something that is mostly for portable use and I can only use it at home and it is sad, because I have had several friends ready to buy in and then not follow through because of the always online component. It is a great program, but could even be better once this is worked out.
I do not know what the right answer is but it is hard to recommend this to other people right now.
For what it is worth, I hope this is worked out before theme support is implemented.
I will keep watching to see what happens.
Peace.