Well as an instructor I personally recommend
Jeppessen FliteLog
Its an easy to use program...100% configurable columns.
It is significantly freindlier than excel, supports multiple logbooks and filtering (without the need to understand excel).
I found it good for both microlights, ppl, instructing, and cpl (both se/me/sea/twin etc - copes with it all). Its not too expensive either. I wont even look at an excel spreadsheet these days...