RetireJapan

Does anybody use their investment products? I was thinking to give it a try. Although they don't seem to have eMaxis slim 先進国株式インデックス fund available, but they have ＜購入・換金手数料なし＞ニッセイ　外国株式インデックス fund, which is pretty similar. I wonder if there any disadvantages comparing to SBI or Rakuten? E.g. do they...