- no wildcard subdomain ssl - poor metrics, nothing per instance - poor dyno granularity - (jumps from 2.5GB RAM to 14, no cpu/storage control) - no transparency on what each dyno actually is - external postgres replication disabled (deal breaker) - no first class postgres metrics and access logs/alerts (kibana recommended, but not great) - no external postgres backups (e.g. S3) - no deletion locks on dynos and add-ons, esp databases!!! - no warning when add-ons like databases are being deleted as a result of apps being deleted - deleting an add-on also irreversibly deletes all replicas and backups - painfully inconsistent naming for databases through their connection str env - dyno types for build processes use Perf-M? Not configurable - No lambda or github action style computing - No scheduled scaling - Unable to choose aws-us regions - Hard 30s timeout limit - Limited to 1 api key per user. No labels, configurable permissions, usage logging - no http/2 - frustrating enterprise offering. massive over-sell, near zero value