I was stupid enough to pay for one month without checking out about them and I was scammed hard. Almost all channels are unwatchable and constant buffering. I tested with free servers and these free ones work better than S4us.They dont reply the support ticket and their discord is barren. Actually my friend told me to try streamsforus and instead I mistook for that garbage. I dont know whether real streamsforus is good or not ,but streams4us is totally bad.
I've used it for a long time no problems for me. Maybe your download speeds are not that fast. I use it with Tivimate had very little issues.