The only time I had a problem with Spell It's live tile not updating, I emailed support and they responded back an hour or so later. They explained that the error, something to the effect of the Microsoft notification service being down, could be fixed via a reboot. I had already rebooted my phone at this point, and that had fixed the issue. It also fixed Weatherbug and a couple of other apps from updating. They also emailed me when I emailed them what I thought was a bug, which turned out to be ignorance on my part. Their support is rather quick and friendly.
I'll definitely stay with Spell It for now, although I'll give AlphaJax a try as well.