I've been meaning to write about Texas Jack's for a while now, but the WaPo listing reminded me. It's in my neighborhood and I've gone off and on since it opened (I've been going about 2x a month recently). I think Don can remove the "warning" from the title at this point. It has had some consistency issues, but the good/great has largely outweighed the disappointing.
I've stuck with the brisket (moist) and pork ribs after trying some of the other meats. The smoked wings were okay, but I didn't love the texture. The sausage didn't leave an impression. I got the pulled pork once and have stayed away ever since (little smoke and dry, but this was well over a year ago). My wife gets the smoked chicken, which I think is "okay", or the fried chicken sandwich. (Compare to Rockland's, which I pass to get to TJs, where I think the best items are the beer, hamburgers and pulled chicken).
The pork ribs have generally been great and have been consistently the best item on the menu. They come with a decent amount of pepper from the dry rub and are still moist. The brisket is sometimes a little inconsistent (once or twice in the past year it has been dry), but the bark is great and the moist brisket is usually on point. The brisket sandwich with queso and fried onions (I think it's from the flat) is enjoyable too.
I can't believe I'd recommend this, but my favorite meal here is brunch. I've made it a semi-regular habit to go and get the huevos rancheros. It can come topped with brisket (or I guess any meat) for no additional charge, but this feature is inexplicably not listed on the menu. The queso, runny egg and other sauces mix great with the brisket, which is chopped. Doesn't hurt that there are cheap drinks ($5 bloody mary).