She's not bad. Actually, to be honest, she has better DPS than Lee-Enfield until Lee's special equipment is available, and is pretty reliable. However, she is releasing after other rifles have come out on EN like R93 and M14mod that supplanted her on other servers, so she might not be a priority for you depending on what you have.

YZ personally promised she would be good, so she is. Really nice stats, including the highest accuracy stat of all rifles. The skill seems odd, being a two-parter but she does way more damage than it seems, and when her skill pops off, she pops off. The mix of rate of fire and firepower buffs is bigger than it seems (the stacks are multiplicative with each other), and she ends with a significant approximate DPS increase of 86% with all three stacks of her buff and her firepower buff active. Even when her skill is not active, she has very good uptime versus bosses and other high HP targets due to the passive effect. Because of her nature, she can slot in with almost any other rifle and benefit from whatever handgun buffers you want to use.