They [MPEX] replaced the Vivitar 285VH in all there Strobist kits. It has nearly all the same features with a swivel. It's new, designed by the strobist, for the strobist.
Check out the
Strobist website for a review.
I trust the Vivitar more than their "custom made for strobist by MPEX" flashes. Do you read all the posts with horror stories of it breaking and what not? Granted MPEX has great CS and replaces them... but if you get the 285, you get a rock solid piece of flash right out of the box.
Also, lets price this out:
Here is what the kit is from MPEX for $255:
Flash $90
Stand $15
Swivel $14
Umbrella $15
Gel kits $10 *1
Bongo ties $5 *2
Gaffer Tape $8 *2
Rosco DIY kit $10 *1
catcus V2s $30
Tripod case $20 *4
Done in parts, you can get it yourself for well under $200 and lose nothing. Now, look at this...
*1 to *4 notes:
1. I can DIY the things myself or buy a 20X26 sheet of Rosgo gel for $7, enough to make 20+ flash head gels. I can also get a Rosco sample pack for anything between free to 2 dollars and get
TONS of gels that fit over the flash (extending the side with a little tape!

). I bought 4 sample packs the last time I went to a local photography store, and several sheets of CTO and ND (-1 and -2 stops) gels. Enough to last me a lifetime.
2. not needed. Honestly... use tape, it does the same.
3. convenient, but really not really needed
3. A cereal box and some tape, some alumium foil and you have 100% the same thing, just for free.
4. Again, no case needed to carry ONE lightstand... come on!
Doing it my way costs you way less ($164):
Flash $90
Stand $15
Swivel $14
Umbrella $15
catcus V2s $30
Thats all you REALLY need to start off... with the exception of maybe the gel sample packs, which are available for next to nothing (free to 2 bucks, as I said before). Plus the 285 is clearly proven itself as a better work horse than the LumoPro.
I like MPEX, but they are filling that up with things you do not need and it is costing you way more than it should. Doing it my way... you nearly get a 2nd flash for free for the price of their kit!
Do people start to understand the advantage of doing the homework now?

Do it... your wallet AND photography will thank you!