One of the most disappointing things by far is that things are so unfinished.
HTTPS keeps being promised, other languages, being able to pay for higher quotas, etc etc etc.
Not to mention the datastore is freaking weird and painful to use. Scalablity is all well and good but I'd rather write my site quickly and scale when needed. If all I'm going to do is make an app for me and my friends, I don't want the gods of scaling to demand virgin sacrifices just to do simple things.
One thing I find quite annoying about the Google App Engine is that it does not allow many slow requests. In fact, it will block your app for several hours if you have issued too many slow requests.
This can be very annoying, especially when you are trying to figure out how to speed up your requests -- it's hard to experiment.
One thing that holds me back is, ironically, lack of scale options.
500Mb limits with no way to go beyond (paid or not) will have to go before I even start planning to move there. It's a pity, because automatic scale was so promising.
HTTPS keeps being promised, other languages, being able to pay for higher quotas, etc etc etc.
Not to mention the datastore is freaking weird and painful to use. Scalablity is all well and good but I'd rather write my site quickly and scale when needed. If all I'm going to do is make an app for me and my friends, I don't want the gods of scaling to demand virgin sacrifices just to do simple things.