I recently purchased a couple of affordable dovetail saws for under 20$ each. A 2 cherries and a ECE, both are gents saw style. Both apparently used the same factory to produce the blades which were less than stellar. The 2 cherries saw says professional quality on the side so you know right away it's not.
The blades featured a tooth pattern reminiscent of a tyrannosaurus, it looked like this: ^^^^^^^^^ . They were symmetrical and looked stamped or roughly produced and weren't very sharp. They weren't japanese style either. I think they cut by virtue of the fact that there were a lot of them. 10 strokes (5 forward, 5 back) produced a cut in pine end grain about 1/4" long. Basically they were useless.
The other night I resharpened the 2 cherries as a rip saw and it functions a LOT better. 10 strokes produces 7/8" cut in the same piece, and it's all around generally better. Last night I filed the ECE into a crosscut and it performs much better as well.
I am not a saw expert by any means but I am pretty sure the dinosaur tooth pattern is not a good one. The saws are useful now but I'd only purchase one with the intent to recut the teeth. Otherwise, save your money for a better saw. Anyone who can comment on the tooth pattern of these is welcome. I will probably learn something.
Here is a pic of the 2 saws along with my disston tenon saw that absolutely rules the roost in terms of cutting.