I have been eyeing that Thread Chest too. The reality is that the spools are costing less than $2.00 each which is really a bargain.
I look at my 'makeshift' chest of threads I have purchased over time and I have a mess with loose strings everywhere, I have no idea what I do and do not have, and no way to organize them because they are various sizes and shapes.
I know I have more than $300 in thread, including the bargains(?) but don't have what I actually need. I do a lot of animals, and they tend to be in the brown and grey family of colors. If I see some of those shades when I am out, I might pick them up. BUT, I get home and find it to be a duplicate. What a mess!!! One time I bought something that was 100 spools for $100. I got a lot of leftover colors that are minimally usable. I try to use them in my test sewouts, but they have a poor stitch ability with lots of breakage.
With this chest, well, you have no questions or messes in addition to having a quality you know and trust. We chose to buy one at a time and be disorderly or spend a little more for a one time investment and have something that helps us keep organized.
If I were to do it all again, I would bite the bullet and get the chest.
I hope you'll visit The Avid Embroiderer my blog for some tips and tricks from someone who enjoys sharing her discoveries.