Sentinel-1 images are distributed as non-orthorectified, which is what you probably notice.
Our “main” service (services.sentinel-hub.com) do not yet support on-the-fly orthorecitifaction.
You might want to try prototype version of services residing on CREODIAS (http://creodias.eu/), which do support automatic ortho. Services are not as stable and they are slower, but it might be good enough for you (they will improve eventually).
If you are interested, let us know and we will establish a test account for you there as well.
Since version 2.2.0 of sentinelhub Python package this is supported. Once you set your instance id and layers at http://apps.eocloud.sentinel-hub.com/wms-configurator/ you will be able to obtain the data from this source if you simply change instance id and base url in package’s configuration file.
Sentinel Hub service is operating on many platforms. Our main service is based on AWS but we have one running on CreoDIAS, Mundi and Onda DIAS-es, main reason being to be able to get access to more data.
If you would like to get access to it, send us an e-mail to info@sentinel-hub.com