I think it's worth it, I really like Heroku as a product. For me it's the Rolls-Royce of cloud platforms. All the Add-ons, Docs, Support etc. is very well crafted and they take design seriously.
Yes it's a great product but the latency is terrible and you can get much better performance for a much much lower cost with other hosts. The design of a host matters little when you are losing money.
I think it's worth it, I really like Heroku as a product. For me it's the Rolls-Royce of cloud platforms. All the Add-ons, Docs, Support etc. is very well crafted and they take design seriously.