Benzylarbutin. Testimonials, information?

Does anyone have any info on this product? What percentage works best?........ I have heard it is close to monbenzene in it's lightening effects but I don't want to be white...or spotted.... I am a dark skinned hispanic.... Closer to african american complexion... I don't have a problem with being brown however... For the past few years I've had a farmer's tan that is about 4 ahdes or so darker than my complexion and it never went away... ( I was in the military and we did a lot of work in the field in the sun) and it never went away even though I've been out of the sun for about 3 years now...... I'm about to begin modeling in bikini and I want to be my old complexion.... I've been using kojic acid cream and soaps along with an arbutin 5% cream to no avail for about 6 months...(however if you have freckles or mild melasma.... This works very well in about 2 months....) but as for lightening..... Nothing...... I am very nervous about trying this benzylarbutin........ I don't want to necessarily BLEACH myself and be pale....... But being 5 shades darker than I used to be is bothering me a lot........ I'm sure most medium brown complexioned women can say that they have had the same experience..... When we tan... It seems that it stays....... I feel strange asking this and even considering lightening because it makes me feel like I'm trying to be more caucasian... But I don't like the uneven skin tone I have now... And it's so drastic..... My arms and neck and face area are about as dark as my nipples and my breasts are light along with most of my torso...... So undressed I look a mess........ So I really would appreciate any feedback that anyone has.... I when to monobenzene.com and posted but it seems that they don't answer questions from new people too much........ Not a very social bunch I guess........ Or they had all been using monobenzene so it's hard to tell if this benzylarbutin product really works because some of them are already light... White... Or have vitilago..... So they can't give me effects on brown skin.......... If not... Does anybody have any products that do work?..... I have tried makari, amira, and don't have a good reaction.... I bought Obagi once but too expensive and too little product comes in each bottle so I couldn't tell if it works cause after two bottles no results...... I'm afarid of hydrquinone products because I've had previous problems with liver and kidneys and it passes through your liver which can be dangerous........ (I'm not trying to die..LOL)thanks........