I just stumbled across this post and since nobody with first-hand experience has yet responded, I'll share. Not as an affiliate, but as a user of the service.
I am very happy with SiteSell (and its product called Site Build It! -- a.k.a., SBI!, for short). Please don't confuse SiteSell with a web hosting company, module or tool that builds websites. It is an e business, self-study course with a unique and extensive set of tools that helps people create sites that get significant traffic and generate sizeable income.
Prior to finding SBI!, I had never built a website before. I had Internet research experience and I used email, but that was the extent of it. Since I wanted to build a site, I decided to give it a try. Some of my friends suggested I get cheap or free hosting to begin with, but I decided to go with SBI. I'm glad I did because I have learned so much and really only paid the subscription fee once since my site has always earned enough to cover the subscription cost. In fact, the more training and experience I get, (even after using other non-SBI tools and hosting), the more I like SBI and appreciate what it does.
Performance is one of the biggest reasons I'm happy. My site is now up to 3000+ visitors a day and I earn close to four figures a month in near-passive income. I acquired this by following the training step-by-step and working hard.
Because of Content 2.0 (an SBI tool), my visitors contribute their own work to my site and my site has expanded more than 10 times its size and 3 times its traffic volume as a result. I only occasionally work on my site now, as it pretty much creates itself. I can do other things with my time and still have income coming in. Even though I only work on my site occasionally, my content remains fresh due to the regular updates contributed by my visitors. Most of my pages are in the top 10 search engine results and in addition to the influx of new search engine traffic, my visitors come back again and again.
I've come across some people saying that SBI is no different than what you get elsewhere on the Net. In my experience, it's always been people who haven't used SBI who say that. With all the tools that are included like the Brainstormer, Analyzer, Link Fix It, Search Engine Tracking (not just traffic reports), Value Exchange, Form Builder, E-Zine Builder and Content 2.0, etc., you can't find a single product who gives you these tools in one place. Some of SBI's tools don't even exist anywhere else.
Supposing you did find and acquire these tools for yourself, you would be paying a good deal more (Content 2.0 would cost $1000's). And other tools are not designed to be as search engine friendly to help your site naturally, honestly and ethically do well on the Net. Others are spammy schemes based on black hat principals that could get you outright banned, or at will at the very least become ineffective once they are outlawed and blocked by the search engines.
Probably the best thing about SBI is the training and support you get for learning and growing your e business. The Action Guide (the owner's manual, or study guide) gives you step-by-step instructions. The SBI community is one of the friendliest anywhere and people really work to help each other. The Support team is professional and competent, while Ken Evoy runs the company with a very refreshingly honest, "customer first" philosophy.
It is with this training that I have learned a great deal through SBI. Not only do I have a successful SBI-based business, I know how to repeat the process on my own or how to help others do it.
Just to test my knowledge, I went to a free site and started building a quick, simple business. Even though I was provided with "tools," there was no background on how or why to use them. Fortunately, because of my training, I already knew what they were for and was able to build some very high-quality pages. But this service was nowhere near SBI in terms of performance because SBI does things for you in the background. My cheaply hosted pages just lie there and I have to do the extra work myself. I highly doubt that using this free/cheap site builder will ever give me the performance I get from using SiteSell, without me putting in a lot more work in the long run.
Plus, I noticed that while I am being given cheap or free tools, the process is slanted to benefit the service itself, not me. I have to work that much harder to earn less using these cheap alternatives and I can never take my property with me if I ever decide to move. That's because the domain name would never be mine - so I would have to start all over again.
I could go on forever with this post, but Site Build It is a very safe investment.
If someone is not inclined to put in some study and hard work, it is not for them. If someone doesn't like structure or process, don't waste your time, because that's exactly what SBI is all about.
But if you're looking to build a successful e business that eventually grows on its own and actually earns income (many times, significant income), SiteSell is your best bet. You get everything you need in one place and tools you won't find anywhere else.
There's even a money-back guarantee. There is no web-hosting, building, training product anywhere that gives you that.