Gin-no-yu/ Kin-no-yu

Hi, anyone been to Gin-no-yu/ Kin-no-yu onsen before? would like some feedback as this is the first time trying on onsen. What other onsen in Osaka recomment?
Thanks

I assume you refer to the public bath houses Arima Onsen in Kobe City.

Yes, I have been to both public bath houses. They are both simple and relatively small. The brownish Kin-no-yu, in particular, is a very unique water that has been celebrated in Japan for centuries as one of the best. Gin-no-yu looks more like "normal water".

For larger baths (and both types of water - as well as blends of the two), I recommend the more expensive Taiko-no-yu. All the baths are also described here:
http://www.japan-guide.com/e/e3558.html

What other onsen in Osaka recomment?

There are no historic onsen in Osaka. But there is Spa World, a modern drilled hot spring with lots of themed baths. Certainly not the right place for a traditional onsen experience, but, nevertheless, very enjoyable.

Kinosaki is about two hours outside of Osaka:
http://www.japan-guide.com/e/e3525.html

Many thks Uji. Another question is the Spa suminoe and Naniwano Yu (included in the osaka unlimited pass) is it a traditional onsen? Thks

Just to tag on a question reqarding public bathhouses like Kin-no-yu, Spa suminoe, Naniwano Yu, Shirahama's Saki-no-yu. Do they provide towels and toiletries? If no, do they usually sell/rent them on their premises (else it would be inconvenient for us to reach the bathhouses unprepared!)?

Do they provide towels and toiletries?

Generally speaking, small towels are usually included in the entrance price or are on sale for a hundred yen or so. Large bath towel are sometimes included in the price or available for rent at an additional cost. Toiletries are not usually provided in public bath houses, but they are provided in the baths of ryokan. They may be on sale at some bath houses. Some traditional baths in the countryside are for soaking only and have no facilities to clean yourself or even prohibit the use of soap.

Above is description of the general situation. In the end, it differs from place to place.