Hi,
Had a 1 night stay here a couple of weeks ago. Main reason was because it was closer to Itami airport and there was a bus directly from Shin-Osaka station to ITM.
Location: It is indeed next to the Shin-Osaka station which is north of Osaka city. It is about 2 min walk from the station to the hotel (it is not linked in any way to the station building but next to it). Tip: Becareful as it is not (imo) easy to find this. So I used the McD in the station as my guide. Just walk in the direction towards McD and you will get out from the station and it's just than a 2 min walk towards the hotel. Subway, buses, train and shinkansen is available from the station. It takes about 15 mins for the subway down to Umeda area.
Check-in: Upon entering the hotel via private club like entrance door (never seen entrance door made fully of wood and it was indeed like some private club entrance in my opinion :P), I was immediately assisted as there was one associate available. No welcome as Elite member, but was provided info on what Elite benefits are. And of course since this is a CY - there are no bellboy to take your luggage of you :P
Elite benefits: Lounge access - opens until 12 midnight on the 19th floor. Here is a copy of the welcome letter and benefits.
Room: Since I booked the cheapest room (originally on a lower floor), my upgrade is to a higher floor. The room was luckily not a Japanese size room. It was like any typical room you will find in Europe/US. Room was well appointed with a view towards the city. Complimentary water bottles were available. Internet speed was ok - I believe there was no separation of premium or basic internet. English TV channels were ok, but as expected the normal culprits of BBC, CNN and I believe 2-3 film channels. There was a guide to use the remote.
Bathroom: A well appointed size area with the normal Nirvana toiletries and toothbrushes, etc (typical Japanese provided toiletries amenities).
Lounge: During non-cocktail/happy hour, the lounge was empty and (as to Japanese style), only 2-3 small items in what they call muffin/ pastry available. Cocktail/Happy hour - hot items were not too bad - but mainly fried items with the Japanese peas. Alcohol selection were ok in my opinion.
Breakfast: This was offered in the restaurant - selection was good and with a good spread of Asian and Western options. Although the place was crowded, service was fast and efficient. I did pop by the lounge during breakfast time - and my advise if you are offered the restaurant that would be better - limited items in the lounge.
Staff: In general friendly staff - lounge attendant (only saw her during breakfast and cocktail hours). Other than that typical Japanese service expected.
In general - as expected Courtyards in Asia especially with lounges are good. In my opinion a good value for the price paid. My only complain is the location - although there is a direct subway line to the main places (Tennoji, Umeda, etc) and if you take the Shinkansen often, around the area there is basically nothing.
I did stay also at the Marriott, which obviously can't be compared to the CY - if location is important, than the Marriott (in the Tennoji area) is much better from all points.