Had no problems with mistoria in liverpool what so ever they are lovely and are easy to get in contact with compared to others in the area! Even the after hour service when the shower was leaking they were within the house within 3 hours. Always gave notice if they were coming into the house.
Only negative i can really give is the ticket system if you need maintenance etc isnt great. But a quick and easy phone call usually sorts it out.
Overall would highly recommend mistoria in liverpool.