Hi,
I've got a medium skylite panel. It's sturdy and simple to use.
The panels attach securely to the aluminium frame using velcro on a stretchy lycra-like material, which ensures the panel is kept very taut - excellent. However, when you first construct the panel it takes a couple of goes to suss out a quick and efficient method of attaching the panel, as the velcro tries to hook onto anything and everything!

However, once you've sussed out a good method it becomes a simple matter.
I nearly bought Calumet's frame & panel system, but they appear to have stopped selling them (or they had at the time, I've not checked since). But it's a similar system employed by other manufacturers. They were cheaper, but the panels attach using a strip of elastic at each corner of the material which simply loops over the frame; which would be fine in a studio but I wonder how well they would perform outside in the wind. However, I'm sure you could 'MacGyver' a way to affix the panels more securely. Please note: I've never used this style of panel, it's just what I *think* might be a problem.
If you're buying the medium size, I'd highly recommend getting the 'Premium' kit over the standard kit. It additionally includes (saving around £75 if you bought the extras seperately):
- Griphead - ideal for attaching the reflector to a light stand or pole.
- Crossbar handle - which makes handholding the panel much easier, and is useful in combination with the griphead.
- Carry bag - which is nice to have, to keep all the bits neatly packed together, but not essential.
However, if you always have an assistant to hold the reflector then the additional items may prove a little less useful.
Hope that offers a little help.
Cheers,
Tony