Hello Michelle.
I bought exactly the same kit a few years ago and at the time it did me fine. They are not the best lenses in the world, but they will certainly do the job. Apart from the moon filter I really didn't find any benefit with the other filters and even the moon filter wasn't used that much.
Eventually I replaced the eyepieces with better quality ones (thought I don't do a lot of observing), I still have the 32mm, which was probably the best of the eyepieces and the case (which was the best bit overall

). The 15 and the 9 were ok. but I rarely used the 6 and the 4 prefering to barlow the 15 and 9. The barlow does an ok job but I found it to have a fair bit of colour fringing, being an achromatic, but initially it wasn't objectionable.
It depends on how much the asking price is for the kit. If it is only in the $200 range then I'd definately be thinking about it. Much more than that I'd be considering geting some better quality eyepieces and a good barlow.
What eyepieces do you have at the moment?