Personally, I am delighted for the brand that ResellerClub has become ever since I started with them in 2012. They are professional, they know their job and most importantly they know and understand how important it is for a reseller to push his business and get more customers.
ResellerClub helped me with everything that I needed to boost my hosting business under my own brand umbrella. Servers are so good that you can only look at an uptime as high as 99.99%. Make sure that you have a good plan that complements your requirements. In any case, you can also scale as per requirement.