Question about box wines, cabernet and merlot and other reds?

Are they any good? Ive been on a red wine kick for a few months now. Went to NY City a couple of weeks ago and now Im spoiled for really good reds. Specifically cabernet. Here is my problem. I can’t really afford expensive wines. Wanting to keep drinking so Im looking to cut costs. The larger bottles can be a little cheaper and of course cheaper wines come in large sizes. But a bottle goes bad in a few days and I can’t drink every day. Considering box wine. Anyone think its a good everyday kind of wine? I notice they come in merlot and cabernet.