*** (Updated review from 20/09/17. I've now been using this product on an as required basis for a year. It continues to be of help & I'm certainly happy with it.) *** Due to extreme pain, disability, long term chronic health issues & the awful side effects of the required prescription meds involved; a normal healthy/balanced diet became exceptionally difficult to maintain. Obviously this is FAR from ideal & the situation as a whole was, & still is a concern. I often have to resort to using different types of supplements as substitutes to important dietary requirements which is not a good place to be at all, however, a whey protein powder was the logical option to cover that particular aspect. Importantly, any weight gain also needed to be avoided or better still, a protein supplement that could actively aid weight loss. (Thankfully this product has helped in that regard.) I very quickly settled upon this "PhD nutrition diet whey protein powder" after a short trial period, & after months testing multiple competing products. All things considered it's pretty good stuff. I still have a couple of minor niggles but they're observations more than criticisms to be fair, (many possibly won't even notice them at all)!! I generally mix up a double serving more as a brunch in place of any breakfast or lunch. This keeps me feeling full right through to the evenings & it helps to stop me snacking in the interim. (I really can't comment on it giving any additional energy, etc., my situation as a whole frequently causes significant fatigue making it incredibly difficult to gauge any such benefit.) Ordering via Amazon Prime works out at roughly £15 per kg which is a very good deal. I also purchased a "600ml PhD mix-ball shaker" as part of a package deal with a 2kg tub & it was a lot better than a shaker I already had. (Well worth the deal if you don't already have a shaker, or if you don't own, want or need a blender.) 1) Flavour. (Whilst obviously ALWAYS completely subjective), I wasn't expecting anything exceptional following the other products I had previously tried out, (especially with this being more of a "diet" option too). However, it certainly surpassed my expectations & it's not unpleasant at all, (I particularly like the Belgian choc or vanilla flavours). When mixed with water alone the shakes can taste just a little powdery but they're still perfectly acceptable as such. (ALL of the other powders I tried were far worse.) Ergo, I often make my shakes using (50/50) water & semi skimmed milk respectively, or 100% SS milk. Either option using milk completely removes the powdery flavour. Adding in any spare fruits or a touch of Greek yoghurt helps too if you blend. 2). Texture. It can also be a little gritty when mixed with water alone, even more so if consumed immediately after mixing. Using milk, or a mix of water & milk (as above) eliminates this issue, however, using milk can make the shakes quite a bit thicker. If mixed with water alone I leave my shakes to stand for 20 mins before consumption which also helps to minimise any grittiness. Again, It's not a huge issue & it remains more than acceptable to me in comparison to competitors products. Inevitably, I get a few tiny lumps that just won't break down when mixing using a shaker too, although they're not large enough to be a problem. Whatever the case, my shakes or blends still go straight down the hatch with no complaints. 3). Storage & longevity. The shelf life of the goods I've continually received directly from Amazon have always been a minimum of 22 months, (previous smaller batches sourced elsewhere barely had 4 months shelf life). It's a fresh product that will certainly last if (for example) you're alternating between 2 or more flavours purchased in bulk. A VERY thin external plastic anti-tamper seal is applied but there's no seal under the lids. The 2 kg tubs really are quite sizeable & some may well struggle with sufficient storage space. (I've included a photo of the 2 kg tub next to a universally sized 1 litre bottle for reference should it be of use.) On the plus side, the tubs are incredibly tough & robust. Once empty they're ideal for repeated reuse such as transferring in powders sourced in cheaper refill bags. The lids form a good seal to keep the powder within dry & fresh. A "single serving" sized plastic scoop IS INCLUDED, (you may just need to use something to fish around for it in the tubs as they can become well & truly buried from transit, etc.). All in all, it's a decent product despite some minor observations. To my mind it's a whole lot better than competing products of a similar price & it's certainly as good or better than some more expensive whey powders too. HIGHLY RECOMMENDED, (just ensure you order a flavour you REALLY like if you're going to buy in bulk as 2 kg can go a long way depending on individual usage). Despite the observations I still rate it 5/5 & I'll certainly be continuing to purchase it.