Courtney Robertson and Ben Flajnik vacation in Mexico. Credit:

Like it or not, Ben Flajnik and Courtney Robertson are still giving it a go -- weeks after the controversial Bachelor couple's dubious reconciliation aired on the fiery After the Final Rose special.

As reported in the new Us Weekly, the California winemaker, 29, and the model, 28, have moved in together in the San Francisco pad Flajnik shares with two pals, with plans to find their own place tout de suite.

Before they find that love nest, though, the talked-about pair went on a sexy vacation to Puerto Vallarta, Mexico.

During their five-day break, Robertson showed off her famous figure in a tiny bikini, and her man doffed his top for time by the pool.

Although Robertson has dealt with public disdain for her catty attitude during The Bachelor -- and then some sympathy after Us Weekly caught Flajnik making out with three other women in February -- "she wants to save this relationship," a source tells Us.

Prior to their trip, an onlooker at San Francisco's Park Tavern eatery observed the engaged pair looking "very snuggly...Ben had his arm around her the entire time."

And Robertson is still wearing her 3-carat Neil Lane ring from her man.

Tell Us: Is there any way this pair could last?