I bought a new sleeping bag for my cycling trip from Alaska to Argentina. Its a Karrimor Global 1100 Lite, 2-3 season rated for temperatures from -7 to 18 degrees. I'll use a sleeping bag liner with this sleeping bag.
Writing this 12 months into my trip, the Karrimor Global 1100 lite sleeping bag was used on a daily basis min the first 4 months. It performed very well on temperatures from 0 degrees upwards. When the temperature dropped a little below zero, then the sleeping bag struggled sometimes, despite me using a good quality sleeping mat.
That said, as a budget sleeping bag, the Karrimor Global 1100 Lite gave me great value for money, and is one of the rare pieces of equpiment to have lasted 12 months, and i feel it will last the full 18 months.