I kept a log for the first 250 dives and then stopped, because I'm lazy. These last years I tried several smartphone apps, finding out after an update the log had been eaten. I tried another one, it said it would back up to the server (London Dive Chamber) and it didn't. I wrote them a mail, asking them how come? Never got an answer.
I had an issue where mine screwed up badly. The dev's of both the phone and PC versions of my logs had me send it to them and fixed it very quickly! Most of the time it's just a simple database fix for them, but something you and I can't fix.
I also make sure my log's are always backed up and synced across all devices to keep from losing anything
I've been very happy with Diving Log 5 and my iPhone Dive Log (all syncs together, made form different devs) and the support they've given me over the years.
---------- Post added August 16th, 2013 at 12:58 PM ----------
Oh, I am offering $1 per signature. Send me your logs and an approved credit card to...