Alexis Bittar is running a 15% off offer on first purchases, which is the brand's headline deal and makes it a great time to start shopping or come back after a break. The site also has selected styles marked down by up to 60%, plus free shipping on orders over $100—so the right choice depends on what you're buying and whether you've shopped with Alexis Bittar before.
If you're a first time customer or returning after a long absence, the 15% off first purchase deal is your starting point. This works on your entire order and typically beats signing up to the newsletter for the same discount, unless you plan to make a purchase later and want to bank the newsletter discount for that future shop instead.
If you're buying under $100 and shopping only from full price items, stick with the 15% off first purchase offer if you qualify for it. That's your best saving at this spend level.
If you're buying $100 or more and shopping from full price items, compare the 15% off first purchase deal against free shipping. On a $100 order, 15% off saves you $15, so the flat discount will usually win unless shipping costs more than $15 in your area. On a $200 order, 15% off saves $30, which is almost certainly better than free shipping alone.
If you're buying from the up to 60% off selected styles section, check the discount already applied to those items. The sale might already be giving you more than 15%, in which case you cannot layer the first purchase offer on top. For items in the sale, your saving is whatever discount is shown on the product page.
If you're ordering $100 or more and mixing full price and sale items, the combination of free shipping plus your existing sale discounts on reduced items, combined with 15% off the full price pieces, will give you the overall best value.
Remember that only one discount applies at checkout, so you'll need to compare what you have in your basket against each available option and select whichever saves you the most. Calculate 15% of your full price items, compare that to the shipping cost, and pick the offer that comes out ahead.