And if you look through their various bundles, sometimes you can find a good deal. I recent purchased a 4 pack of 12V 8AH batteries from them for $55 shipped, so $13.75 each. It really pays to search through their various Amazon bundles since the price per battery can vary fairly wildly at times.
Having ordered probably 20 batteries through them, I only had a problem with one batch. That was the 4 pack of 12V 15AH batteries for our Dune Buggy. The package was heavily damaged in shipping, arriving with a huge hole in the side. The battery closest to the hole had noticeable cracks on top, and after popping the top off I found two of the cells bone dry where the acid had leaked out. I contacted customer support and they shipped me a new one with no questions asked.
After running them for a bit, I found another one had lower capacity than the others. I contacted them again, and they promptly emailed me a pre-paid return label to send the battery back for testing. A few days later, a new battery showed up at my door.
Then I found a THIRD battery that would leak acid after a hard run. And pulling 100+ amps over and over powering the industrial motor through wheelspinning starts and high speed drifts, we run them hard. I assumed it was boiling over. The rest of the batteries did not do this. I sent them a picture and once again, no questions asked, they shipped me a new battery.
So while on average you do pay a little more for the SLAs through Chrome, the fast shipping and actual warranty support make it worth it to me when dealing with electrics that we use for personal use. Now, for something I plan on selling, they get the cheapest of the cheap eBay batteries if the price can be had much lower.
48V Razor MX500 w/ yk42-4 50A controller
48V 100A Industrial Motored Razor Dune Buggy - Sold
60V Huffy Panama Jack, 9C hub motor, 31 MPH - Sold
89V Schwinn Cruiser Supreme, GM 901 hub motor, 52 MPH - Sold