Assuming that you are referring to the Interfit range of strobes, yes they are quite good value because they at least have a history from their manufacturers.
The lower priced stellar units are very much generic units made in China but that isn't necessarily a huge drawback.
Current prices at a retail level are highish and if they are selling them for 1/2 price as a clear out they probably represent pretty good value.
600 WS lights are strong, if they are able to be adjusted down satisfactorily to lower levels then they probably will work fine in a small studio environment.
It is always easier to get less
light from powerful units than to get more
light from lower powered strobes ----