Originally Posted by IBQLTN

I used to sell singers also. If it is the bottom end the blade comes down from the top instead of up from the bottom and makes it harder to see the needle area. It is very tempramental and difficult to thread.

I would go with a store that is going to provide training and support for whichever serger you select. It's not like a sewing machine, they are not all threaded alike. They do not all sew alike. Some have differential feed, some don't. Some have self ajusting tesion, some don't. Some come with a one year warranty, others with just 90 days.
I totally agree. They can be nasty little boogers sometimes. I practiced on scrapes forever to get tension right. It also changes with different fabrics.
Trying to learn the serger with no support or training would be like trying to climb a mountain when you've been training for a spelling bee.