Cool concept... I think there's definitely a sweet spot for guys who have no idea what to buy their girlfriend or whatever...
Couple of thoughts, though they're not specifically about the landing page, more general things that popped into my head (bear with me!)
- I'm not sure if many guys will be that into giving a gift every single month just because, but to keep in line with the subscription model you could give an option to send more expensive gifts for just specific months (say their birthday / christmas) and then maybe just one or two other random occasions throughout the year as the "just because" gift.
- I didn't get the gift brother name straight away. I guess what you're going for is "gift BROTHA" cool spelling and all, which is actually a great concept, I'd play on that as soon as you can--hire a designer to create a really cool looking cartoon guy, or something, who is like this suave guy who just gets girls/partners/signficiant-others and is the ultimate wingman for gifts--it's a really great idea to play off, because I think people will really get the concept from that, as well.
- To start have a DEAD-SIMPLE explanation with maybe three steps...maybe just three big images and descriptions like:
1. Tell us about your partner and subscribe
2. We do all the shopping / thinking / work
3. You get all the credit!
And you can be really funny/creative with that last one, so go nuts. I think people would dig a quirkier approach, cause it's a great concept.
After that, though there needs to be some more details, like where you get the gifts from, what kinds of gifts you can get and the prices point(s) available... whether you ship to obscure countries like mine (Australia) and ways to put the service on hold (or stop it?) for when you fall out of love... maybe you could switch to getting manly gifts for yourself when you don't have a significant other, just to ease the pain of the heartbreak (or something)
Just some thoughts. Looks cool!