Fair price for a 2GB SIM and one month use for my iPhone 5S. Good coverage of 4G signal in most places, even 3G was good in remote and rural areas of Shikoku. The settings for APN were easy and the phone was ready in a couple of minutes. NTT DOCOMO was the operator during my 3 weeks of use. I wouldn't hesitate to repurchasing if were needed.
The product works and it was delivered promptly. I live in an area (Niseko, Hokkaido), where it was not possible to buy any prepaid SIM card in a shop. I ordered this SIM online, paid for it at Lawson and received an email a few days later, when it arrived at Lawson. I like the fact that WhatsApp and LINE do not count towards the data usage.