You might want to do some deeper delving before opting for The Gel Bottle. I have been using their products alongside another brand (using each complete system though, with correct lamps) and haven't personally had any problems, but there are many posts popping up on other forums where nail techs, clients and even educators have developed allergies and onycholysis since using TGB. The company have not properly addressed these issues in my opinion, and appear to have recently removed the MSDS from their website!
It's difficult to prove whether a specific brand has caused an allergy as over exposure could have happened over a long period of time, but there have been a number of issues since the brand started, like the fact they sold to unqualified people for a long time (and I understand it's still hit and miss whether people are asked for proof), there was no education program in the beginning, so a lot of people were and possibly still are, not applying or curing it carefully or correctly.
When buying into a brand, I want to know that the brand is totally knowledgeable about what they are selling and about the industry in general. I get the feeling with TGB that they are learning as they go!
Any brand you are interested in, do as much research as possible. There's no such thing as the perfect product for everyone, but you certainly want to be ticking as many boxes as possible.