I love this sleeping bag! I can't say if the temp is accurate or not as its my first sleeping bag. Its summer time the forecast says its been 16-18c (certainly hasn't felt like it) and i have felt perfect in it with thin pjs on. That could just be my preference though without using another brand of the same season it would be unfair for me to judge.
The sleeping bag is well made and super comfy. Its a absolute bargain i highly recommended it