My partner and I stayed at Merrilyn's place for only a night but the stay was perfect. She picked us up from the airport (with a fee but much less than what it would have cost us if we took the airport shuttle); she also dropped us off at the Port where we took the cruise and to the Redline bus terminal on our way to Hobart the following day (for free!). Merrilyn was very warm, welcoming, and helpful. We value her advise for us to see the Gorge up close (we already saw it from the cruise, but being there was much better)-- many thanks to her for telling us about it, it was the highlight of our trip to Launceston).
The room that we got (at the second floor) was lovely, the bed and pillows very comfortable, and we had the bathroom to ourselves (there is another room upstairs but she does not rent it out). This gave us privacy - we practically had the second floor to ourselves. She also provided a nice breakfast even when we had to leave early. Merrilyn's place has a nice outdoor garden too
The location is about 20min walk from the city centre. It is not very close, but it was a pleasant walk.
Overall I'd very much recommend staying at Merrilyn's. If there's a chance to visit Launceston again, we'd definitely choose to stay at Merrilyn's place.