We stayed at Bellevue for 4 nights in Oct. 2019. Overall we thought the place was a good value for money - it has a lot going for it. The views are stunning. The location is very good with easy access to Kilaloe, Nenagh and of course Cillian's nice pub (Larkin's) in Garrykennedy. Heating was good and the gas fire in great room was very nice. There is ample room for up to 10-12 people. There is fully stocked kitchen. That said, we'll share our thoughts on some of the critiques raised in other comments.
Reading the previous reviews we were a bit concerned the hot tub wouldn't be working (well/at all). This was the primary reason we booked this particular place, so we contacted Cillian to ask. He eventually got back to us and told us the hot tub was working. This was true, but it ended up not being the fiberglass hot tub embedded in the deck as in the photos, but an inflatable hot tub on the front garden. In all fairness it worked fine and we still had the views, but it wasn't quite what we had been expecting. We're not sure if this is just a temporary option while the other is getting fixed/replaced but if the hot tub is a major selling point for you you may want to check the status with Cillian before you book.
Regarding the house itself. Other comments have noted issues with cleanliness. We found the house to be perfectly CLEAN, there are just parts of it that are in a poor state of repair. We understand from Cillian it was a Celtic-tiger build, and it shows - floor tiles cracked, loose capstones on exterior walls, some showers that don't seem to fully function, loose handrails, etc. This didn't really bother us or detract from our experience, but if you are expecting a house in perfect nick you might be disappointed. That said, the main floor of the house is in much better condition than the basement. If you're only using the main floor (with two bedrooms and 2.5 bath - both of which seemed to work fine) you'll hardly notice. The basement, however, has more serious issues. It's pretty clear it suffered some significant water damage at some point. While it's all cleaned up and nicely decorated, it hasn't been properly re-mediated. The subfloors in some of the bathrooms are completely gone (causing major floor instability), some bathroom tiles are separating from the walls, some damp and musty odors, etc. The cleaning and decorating means the basement bedrooms are functional, but there are some warts.
The drive is pretty bad. We managed it in a small car and a seven seater with low clearance, but it is in pretty rough shape. I wouldn't bring Ferrari up it!
Overall we had a very nice time. Cillians was friendly and helpful. And, given the size of the place with the location and views we thought it was very good value for money. The drawbacks of the place ultimately didn't really dampen our experience.