I backed the Great War boardgame on KickStarter and got a heap of these miniatures. Got some more when I backed the follow-up Tanks campaign.
They are pretty good quality miniatures rendered in hard plastic which seems to take paint pretty well. The base sets offer a reasonable variety of poses. The only thing to really watch is that the mold vents (is that the right term?) are on the end of the bayonets for the British so if you're not careful (and sometimes even if you are) bayonets can be snapped off when they're removed form the sprue. Other then that - no real worries.
The sprues come with HMGs and trench mortars and crews and there are separate artillery sprues with field guns and crew. There is also a set of eight metal generals - one for each major protagonist nation in WWI.
Note that there are currently only late war (i.e. helmeted) British and German plastic miniatures currently available. The next release is thought to be the French. Not sure if there are plans to go early war or add things like cavalry but the Tanks rulebook does mention engineers as being something that will be released in the future.
Overall, I'd recommend them as worth a look.