Can't fine tune it. Can't use it on private data. Pay per symbol. High latency access. Inconsistent performance. No internet disconnected use. Can't guarentee r

Can't fine tune it. Can't use it on private data. Pay per symbol. High latency access. Inconsistent performance. No internet disconnected use. Can't guarentee repeatable results. Can't (easily) replace the sampling with alternatives that have different behavior (e.g. for using it for compression).