Ive got the Halfords 150 piece set as well Paid just under the £100, lifetime guarantee
http://www.halfords.com/webapp/wcs/stores/servlet/product_storeId_10001_catalogId_10151_productId_173083_langId_-1_CarSelectorCatalogId__CarSelectorGroupId__varient__categoryId_76863_crumb_33958-76859_parentcategoryrn_76863Fully agree with the above comments about the comfort factor, and was told the same before I bought it.
but, I like it
I like the fact it is a great starting set with most of what you need, all in one box...some of the little bits do have a tendancy to move in the box though

If you don't intend doing a lot then fine, the people who don't get on with it are generally the far more talented people who do a lot more work.
Its handy for me to take just the 1 box out to the car, and have what I need there and then.
Other bad points include some of the sockets are a bit large externally so can be awkward to use,
I think getting some size adaptors and longer extensions is also recommended.
It may also be a little large if you only work on Vauxhall, as it is metric and AF, so could be a lot smaller.
I dont regret buying it, and would buy it again, but I wont need to as each tool is lifetime guarantee'd
I wouldnt pay the full £150 they want though, it comes on offer at £99.99 frequently, and you can get a bit more off to with a trade card.