It really is quite upsetting to see that so many people rated Seneca so low after my experience with it. Seneca's just been so good to me. I took Accounting and Payroll (APP) for a diploma and am currently doing International Accounting and Finance (IAF) for a degree.
People are bashing the lecturers and professors a lot but I've had really good ones for the most part. No university or college is going to be overflowing with professors that absolutely everyone loves. I found a lot of my lecturers had experience in the field in courses I took (ex: Taxation, Human Resources, Call Centres) and it really does help drive home certain points that you need to learn. The one knock on Seneca I'd have to say is that the lecturers they have for their core APP courses are god awful. They simply read from the textbook and expect you to memorize it with no hints to help you. For your APP courses, you're required to pay the CPA (Canadian Payroll Association) directly for their paperback 'textbooks' and you can't really buy them second hand because they aren't real textbooks, just notes bundled together. The CPA is mostly to blame for how poorly they run their courses because they hire lecturers for the APP courses, not Seneca. Then, their evaluation is 80% fill in the blank and multiple choice on their online servers. Outside of the APP core courses, I did enjoy almost all of the rest of my courses. So while I can't really recommend the APP program unless you're really into that style of testing, I can recommend the college as a whole.
Something someone else mentioned is that since Seneca offers diplomas and degrees, you can VERY easily go from one to the other with very little difficulty. After I finished my diploma, I was able to take related credits from APP and use them for my IAF program, thus exempting me from ten courses. It's extremely easy, at least it was with my coordinator. I simply went through my APP program courses with him and he listed all the courses for IAF that I could be exempted from. Easy.
One thing that Seneca does is keep their belief on teaching by application. Colleges in general do this, but even with Seneca's degree program, they do their best to keep the feel to that of their diploma (ie: learning by doing). This is one of their strong beliefs and it's really helped me, since the traditional university style of learning (ie: more about knowledge and understanding) simply isn't for me.
I've been seeing a lot of people complaining about the administration staff but I haven't had a problem with them in three years at all. So I'm not sure what's going on there. Just pay your fees on time, pay attention to deadlines and you won't have a problem. You use your student card to pay for parking, check out books and pay for printing, all of which are easily done too.
Campus is generally kept very clean by the staff that work there. Classrooms, the computer commons, library, washrooms and hallways are always kept very clean and tidy. They actually revamped their Wi-fi a few months ago and it's a lot more consistent now.
Seneca college, provided you find a program that you'll like, is a great place to take your post-secondary education. They mostly concentrate on the business section, but they still have other programs so most anyone who wants to pursue college can find something they like. As far as their degree programs go, throw out that stigma that colleges are of a "lesser" education. It's simply not true. They still offer you your Degree of Commerce (in my case), which is just as good as one at a place like Laurier or Ryerson. Give them a chance because my experience there has been positive almost the entire time I've been there.