I rarely travel but I've been hearing people I work with opening an American Express Platinum card to get access to airport lounges to make their travel layover easier. Have any one here used an American Airlines or Delta Skylounge that want to give a mini review? I usually use the Military USO lounge which have wifi and computers and sofas and that was good enough for me.
We're all in the military so our annual fee are waived. But the thought of opening another credit card makes me cringe because I have four open already. None of them have an outstanding balance and having another one might kill my credit rating.
Highly dependent on where you go. Delta lounges are slightly less crowded now that they have clamped down on how many people can enter for free but the food and drink offerings are slim. Basically some free snack options (pretzels, celery, carrots, crackers etc) along with free soft drinks and some cheap alcohol (Not that I don't partake for afternoon\evening flights) The Centurion lounges are quite good with full meal options, better alcohol and massage options but they are few and far between. If you hit DFW, LAS or LGA then its a very nice benefit. If not then...well thats not really a benefit. I never seem to be able to transit DFW when the bar or masseuse is available

You get priority pass which can be nice but again varies by airport and might ahve restictions based on who you are flying with or be inconveniently located in a distant concourse. Both tend to have shower options which some enjoy but my flights usually mean thats not a consideration.
I've never been in a USO lounge but the sky lounges aren't really anything special so I imagine there isn't much benefit there. If you travel internationally then there might be more of a benefit. I've noticed the Priority Pass lounges are notably better than the normal concourse experience in international locations and that international lounges can be much better than domestic ones
All that said I don't hold the platinum card for its lounge access. I fly Delta and Southwest a lot and frankly don't miss the domestic lounge access much when I fly Southwest. Still...if its no annual fee instead of $450 then its probably not a bad option. They have medical evacuation coverage, $200 airline credit (which usually covers a gift card purchase), provide SPG gold membership, sometimes Hilton gold, lots of various spend X here and get a Y credit opportunities (ex: spent $50 at amazon and get a $10 credit), access to Amex Fine hotels and resorts ($100 meal credit, 4 pm late checkout, 12pm checkin, room upgrade, often for the same price or less than the hotels rack rate) Good customer service and National Exec membership (National is incredibly easy to deal with for car rentals although their pricing is hit and miss)