Went out with Barbados Blue some years ago, on a cruise stop. Everything was good, no complaints. But the next time (I've been to Barbados on cruise ships around eight times, always diving) I found Roger's Scuba Shack and have been using him since. What I like about Roger's:
--- very relaxed atmosphere, everyone is welcoming and friendly
--- they'll pick you up and drop you off at the cruise terminal, always been great with this
--- they're a bit closer to the cruise terminal than Barbados Blue
--- the crew, the boat, the dives... everything was A+
--- Roger runs the show and has been doing it for 40 (?) years
You didn't ask, but if you're interested in St Kitts... been there about as many times, on cruise ship stops, always dived with Austen at Pro Divers. It's his shop, he guides the dives (at least he was always our guide) and he's been doing it (like Roger in Barbados) for decades. Their shop is right next to the cruise port... just about walkable, but Austen always drove us back and forth anyway.
Also didn't ask, but St Lucia... my favorite of all these islands for diving. I have always used Dive Fair Helen and they have always been 100%. Been there a bunch of times on a cruise ship, spent a week on St Lucia this past January diving with DFH for the week.